Strip Indicator Patents (Class 422/87)
  • Patent number: 11243195
    Abstract: Systems and methods are provided for tracking all chemicals, including odors, a package is exposed to throughout the shipping process. A device is attached to the package or placed within the package to extract the chemicals that are in the surrounding environment to the device. The device can extract and concentrate volatile, semi-volatile and non-volatile chemicals that the device and the corresponding package are exposed to throughout the shipping process. The extracted chemicals may then be desorbed from the device and analyzed by an analytical instrumentation method.
    Type: Grant
    Filed: April 20, 2018
    Date of Patent: February 8, 2022
    Assignee: Volatile Analysis Corporation
    Inventors: Mitchell Ray White, Christopher P. Christenson
  • Patent number: 9739737
    Abstract: A sensor device can include a transition metal complex capable of interacting with a carbon-carbon multiple bond moiety. The sensor can detect the fruit-ripening hormone ethylene with high sensitivity.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: August 22, 2017
    Inventors: Timothy M. Swager, Birgit Esser, Jan M. Schnorr
  • Patent number: 9347932
    Abstract: The present invention describes a device and method for measuring flow rate from air flow using acoustic resonance. It is shown that the device can be used to measure breath flow rate and biomarker concentration within human breath.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: May 24, 2016
    Inventors: Nongjian Tao, Francis Tsow, Anant Rai
  • Patent number: 8955515
    Abstract: A sensor 40 that detects a chemical such as an organic vapor. The sensor 40 includes a film that has a film body 58 that includes a detection layer 48 and that is responsive to the presence of a chemical by providing a color change. The film also includes an occluding layer 54 that has a first major surface 59 and that is bound to the film body 58 but is inert to the detection layer 48 to preclude the occluding layer 54 and the chemical from causing a color change in the film body 58 in an area 42 normal to the first major surface 59 of the occluding layer 54. A sensor having this construction can provide a distinctly visible image on the sensor, which may be helpful in evaluating the remaining life of a filter cartridge.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: February 17, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Neal A. Rakow, Thomas W. Holmquist-Brown, Brian L. Linzie, John C. Hulteen, Duane D. Fansler, Richard J. Poirier, Vivek Bharti
  • Publication number: 20140242714
    Abstract: A filter element having filter media for filtering air passing therethrough and a detection strip attached thereto comprising a chemical compound that generates a chemical reaction with certain molecules that contact the detection strip.
    Type: Application
    Filed: February 22, 2013
    Publication date: August 28, 2014
    Applicant: BHA Altair, LLC
    Inventors: Bhalchandra Arun Desai, Huong Van Vu, Michael Adelbert Sullivan
  • Patent number: 8722417
    Abstract: An apparatus is provided for sensing an analyte in a fluid.
    Type: Grant
    Filed: January 20, 2007
    Date of Patent: May 13, 2014
    Assignee: Invoy Technologies, L.L.C.
    Inventor: Lubna Ahmad
  • Patent number: 8591818
    Abstract: A (H2) sensor composition includes a gas permeable matrix material intermixed and encapsulating at least one chemochromic pigment. The chemochromic pigment produces a detectable change in color of the overall sensor composition in the presence of H2 gas. The matrix material provides high H2 permeability, which permits fast permeation of H2 gas. In one embodiment, the chemochromic pigment comprises PdO/TiO2. The sensor can be embodied as a two layer structure with the gas permeable matrix material intermixed with the chemochromic pigment in one layer and a second layer which provides a support or overcoat layer.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: November 26, 2013
    Inventors: Gary Bokerman, Nahid Mohajeri, Nazim Muradov, Ali Tabatabaie-Raissi
  • Patent number: 8496880
    Abstract: A test strip construction includes a test strip having a testing region bearing a chromogenic reagent to detect the presence of a substance in a fluid test sample. A supporting member is attached to one end of the test strip in a manner such that the testing region is remote form the attachment point and is free from any contact with supporting member. When dipped into the test sample the test strip can flutter away from the supporting member to allow for full contact between that the testing region and the test sample. When removed from the test sample the supporting member provides a consistent background for observation of color changes of the reagent.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: July 30, 2013
    Assignee: Precision Laboratories, Inc.
    Inventor: Eva Hrboticka
  • Patent number: 8481329
    Abstract: The invention relates to an analysis system for the photometric determination of an analyte in a body fluid, having an analysis device and a test carrier. The test carrier has an evaluation zone in which a photometrically detectable change takes place as the result of a reaction of a sample of the body fluid which contacts the test carrier with a reagent contained in the test carrier. The analysis device comprises an optical emitter for emitting light onto the evaluation zone, an optical receiver for receiving light from the evaluation zone and for generating a measurement signal corresponding to the received light, and a measurement and evaluation device with a measuring unit and an evaluating unit. The measurement signal is amplified and digitalized in the measuring unit. In the evaluating unit, the concentration value is determined from the digitalized measurement signal.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: July 9, 2013
    Assignee: Roche Diagnostics Operations, Inc.
    Inventors: Ulrich Porsch, Robert Lorenz
  • Patent number: 8475717
    Abstract: A police tester to detect the presence of a target substance includes a housing adapted to be mounted in a police cruiser; a chemical reservoir insertable into the housing; a test swipe in a disc or an automated cartridge, the test swipe adapted to receive a chemical from the chemical reservoir, the test swipe including one or more chemically treated pads; a camera to capture an image from the test swipe; a processor coupled to the camera to process the image to detect the target substance; and a transmitter coupled to the processor to transmit a test result to a remote computer at a police headquarter.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: July 2, 2013
    Assignee: Chemspectra, Inc.
    Inventors: Jeffrey Haas, Douglas Haas
  • Patent number: 8470248
    Abstract: A detector detects the color of a medium after a gas to be identified and a reagent have chemically reacted with each other on the medium. A controller identifies color information, which is most similar to the color detected by the detector, from color information stored in a spectral database, and reads gas identifying information related to the identified color information, as gas identifying information representing the gas to be identified, from the spectral database.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: June 25, 2013
    Assignee: NEC Corporation
    Inventor: Naoki Oda
  • Patent number: 8450115
    Abstract: A portable chemical analytical apparatus to analyze a test swipe includes a heater to warm the test swipe to a predetermined temperature; a clamp to secure the test swipe to the heater; one or more pumps to dispense one or more chemicals onto the test swipe from a disposable cartridge; a fan to remove chemical vapors rising a predetermined distance from the test swipe; and a camera to capture an image of the test swipe for automated analysis.
    Type: Grant
    Filed: November 11, 2011
    Date of Patent: May 28, 2013
    Assignee: Chem Spectra, Inc.
    Inventors: Jeffrey Haas, Douglas Haas
  • Patent number: 8409864
    Abstract: An ammonia gas sensing device includes a housing defining a fluid flow path. The fluid flow path includes a fluid inlet, a fluid outlet, and an access port. A gas permeable/liquid impermeable membrane is mounted on and sealed against the housing at the access port such that the membrane is exposed to the fluid flow path but fluid is blocked from flowing outward of the access port around rather than through the membrane. An ammonia sensor is mounted on the housing at the access port in a position outward of the membrane. A system for using the ammonia sensing device includes the ammonia gas sensing device, a light source directed at the ammonia sensor, a photo detector to measure the light reflected off the ammonia sensor from the light source, and a controller for controlling the light source and optical sensor.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: April 2, 2013
    Assignee: Renal Solutions, Inc.
    Inventor: Stephen R. Ash
  • Patent number: 8273298
    Abstract: A device for detecting human body odors produced from ammonia and amino acids—chemicals naturally excreted through the skin and sweat glands. Unless eliminated, such odors can alert game animals to a hunter's presence. Worn on the exterior of odor-absorbing clothing, the device includes both a packet and an indicator chemical sensitive to extremely low concentrations of nitrogen-containing compounds. The packet defines first and second openings which, in use, are directed away from and toward the wearer's body, respectively. Affixed to the packet, a transparent tape forms an airtight window through which one can continually view the indicator chemical, held in place within the first opening by the tape's adhesive backing. Accessible only to substances which pass through the wearer's clothing and then into the packet's interior via the second opening, the indicator chemical undergoes a permanent color change, once odor-producing chemicals begin to break through the clothing.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: September 25, 2012
    Inventor: Thomas L. Newell
  • Patent number: 8247233
    Abstract: An integrated meter system for determining information related to an analyte of a fluid sample includes a meter including a housing and a plurality of test sensors. Each of the plurality of test sensors includes a penetrating member, a testing portion, and a channel. The channel is adapted to receive the fluid sample. The test sensors are removably located within the housing. At least one of the test sensors is removably connected to an adjacent test sensor. The integrated meter system also includes a test-sensor advancement mechanism that is configured to advance the test sensors.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: August 21, 2012
    Assignee: Bayer Healthcare LLC
    Inventors: Igor Gofman, Mitchel Stein
  • Patent number: 8084003
    Abstract: A vessel (102) containing a detector solution (101) is prepared. The detector solution (101) is an aqueous solution prepared by dissolving a detector component containing a dye which changes its color when reacting with ozone gas, a humectant, and an ultraviolet absorber having a hydrophilic group. A prepared sheet-like carrier (103) is dipped in the detector solution (101) for, e.g., 30 sec, thereby forming an impregnated sheet (104) by impregnating the sheet-like carrier (103) with the detector solution (101). The impregnated sheet (104) is then dried by evaporating the solvent (medium) such as water contained in the impregnated sheet (104), thereby forming a sheet-like ozone detecting device (105).
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: December 27, 2011
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Takashi Miwa, Yasuko Maruo, Jiro Nakamura, Tatsuya Kunioka, Seizo Sakata
  • Patent number: 8067110
    Abstract: A sorbent media protective device includes an enclosure having a gas inlet, gas outlet and a thin-film multilayer indicator. The thin-film multilayer indicator is proximate sorbent media that can sorb a vapor of interest flowing from the gas inlet towards the gas outlet. The indicator includes a porous detection layer whose optical thickness changes in the presence of the vapor, located between a semireflective layer and a reflective layer permeable to the vapor. With equilibration at the applied vapor concentration between at least a portion of the media and the vapor, the vapor can pass through the reflective layer into the detection layer and change the detection layer optical thickness sufficiently to cause a visibly discernible change in the indicator appearance if viewed through the semireflective layer.
    Type: Grant
    Filed: September 11, 2006
    Date of Patent: November 29, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Neal A. Rakow, James P. Mathers, Jun-Ying Zhang, Dora M. Paolucci, Richard J. Poirier, Moses M. David, John E. Trend, Michael S. Wendland
  • Patent number: 8001825
    Abstract: Methods of auto-calibrating a meter are disclosed. In one aspect, the method can include determining a set of calibration information applicable to a sensor and storing the calibration information onto a tag element associated with a sensor dispenser. The tag element can be placed into communication with a reader element that is associated with a meter and which is configured to receive the calibration information so as to allow the meter to use the calibration information in a calibration procedure. Various aspects of a system for auto-calibrating a meter are also disclosed.
    Type: Grant
    Filed: November 30, 2007
    Date of Patent: August 23, 2011
    Assignee: LifeScan, Inc.
    Inventors: Jerry T. Pugh, Koon-wah Leong, Arjuna Karunaratne
  • Patent number: 7976781
    Abstract: An aqueous solution is formed by dissolving a dye made of alizarin and a humectant made of glycerin, and alkalized by dissolving a base (alkaline substance), thereby preparing a detector solution (101) in which the content of the humectant is about 20 wt %. An impregnated carrier (104) impregnated with the detector solution (101) is formed by dipping for 30 sec a sheet-like carrier (103) made of cellulose filter paper in the detector solution (101) so that the carrier (103) is impregnated with the detector solution (101). The impregnated carrier (104) is pulled up from the detector solution (101), and dried in dry nitrogen by evaporating a solvent such as water contained in the impregnated carrier (104), thereby forming an ozone detecting device (105).
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: July 12, 2011
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yasuko Maruo, Takashi Miwa, Jiro Nakamura, Tatsuya Kunioka
  • Patent number: 7977103
    Abstract: A method for detecting the onset of ovulation in a female mammal is provided. The method includes contacting mouth air of the female mammal with an arylmethane test chromogen in an amount effective to undergo a rapid and detectable color change in the presence of one or more volatile sulfur compounds. The color of the test chromogen is compared to a control color that corresponds to a pre-ovulatory sulfur content. The difference in color between the test chromogen and the control color is correlated to the onset of ovulation.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: July 12, 2011
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Stephanie Michelle Martin, RameshBabu Boga, John Gavin MacDonald
  • Patent number: 7951331
    Abstract: The invention relates to embodiments of an analysis system and to a method for analyzing a sample on an analytical test element, with the analysis system comprising a test element receptacle for receiving and positioning a test element in an analysis position. In an exemplary embodiment, the test element receptacle contains a guide part and a lock part, the guide part having means for guiding a test element into and out of the analysis position, the lock part comprising a frame and a bolt element, which frame and bolt element are connected to one another by a hinge. The bolt element can be pivoted about the hinge between a first position and a second position with respect to the frame. The bolt element comprises a latching lug for engaging in a recess in test element when the bolt element is in the first position and when the test element is positioned in the analysis position.
    Type: Grant
    Filed: July 11, 2007
    Date of Patent: May 31, 2011
    Assignee: Roche Diagnostics Operations, Inc.
    Inventors: Bernd Roesicke, Stefan Kalveram, Frederic Wehowski, Michael Goetz
  • Patent number: 7943091
    Abstract: A chemical exposure indication device is disclosed. The device is removably attachable to a structure and includes a substrate having a first surface and a second surface and an indicating layer overlying the first substrate surface. The indicating layer includes a coating material that is chemically reactive with a pre-determined chemical compound that is known to degrade the structure. When the coating material is exposed to that corrosive compound in a pre-determined level associated with degradation of a metallic structure, the coating material provides a visual indication of the presence of the corrosive compound.
    Type: Grant
    Filed: November 16, 2007
    Date of Patent: May 17, 2011
    Assignee: The Boeing Company
    Inventors: Carl W. Beck, Rebecca L. Storey
  • Patent number: 7833481
    Abstract: A fully integrated portable screening system includes a main housing and a contact pad. The contact pad is removably positioned in the main housing and covered by at least one sample sheet. The contact pad is preferably constituted by a cylindrical baton which carries a roll of sample collection sheets. A test subject interacts with the contact pad, leaving a trace sample on the sample collection sheet. The contact pad is then placed within the main housing and the trace sample is exposed to a test medium designed to interact with a specific analyte of interest potentially present in the trace sample. After exposure to the test medium, the sample sheet is subjected to a testing mechanism which exposes any interaction between the test medium and the analyte of interest to produce a test result.
    Type: Grant
    Filed: September 22, 2006
    Date of Patent: November 16, 2010
    Assignee: RedXDefense, LLC
    Inventors: Khaled F. Eltomi, Jack Kotowicz, Pratheev Sabaratnam Sreetharan, Regina Elvira Dugan
  • Patent number: 7785894
    Abstract: An indicator that reacts with at least one gaseous compound in such a way that the color of the indicator is changed. The indicator is a layer formed on a substrate and including metallic silver and/or metallic copper.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: August 31, 2010
    Assignee: UPM Raflatac Oy
    Inventors: Maria Smolander, Eero Hurme, Markku Koivisto, Sami Kivinen
  • Patent number: 7638095
    Abstract: A test meter system includes a cartridge that houses a test strip tape, which includes a plurality of test elements, and the cartridge defines a meter opening. The cartridge further incorporates an indexing mechanism for indexing the test strip tape. A meter is configured to analyze body fluid via the test strip tape, and the meter includes a display for displaying test results as well as other information. At least a portion of the meter is received in the meter opening of the cartridge to provide a compact configuration. In one form, the test strip system has a generally cylindrical outer shape to provide a pleasing handheld shape.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: December 29, 2009
    Assignee: Roche Diagnostics Operations, Inc.
    Inventor: Peter Sabol
  • Patent number: 7611671
    Abstract: Highly sensitive devices for detecting nitric oxide and/or other gaseous analytes in gaseous samples are improved by the incorporation of a carbon monoxide scavenger in the interior of the device or in the device packaging. The release of carbon monoxide within the housing of the device by the plastic used in the construction of the housing or by anything within the device that releases carbon monoxide causes a loss in sensitivity due to competition between the carbon monoxide and the nitric oxide for the binding sites on the device sensor. The scavenger corrects this by either catalyzing the oxidation of carbon monoxide to the less competitive carbon dioxide or immobilizing the carbon monoxide by affinity-type or covalent binding. Analogous effects are achieved for analytes other than nitric oxide but that likewise encounter interference from carbon monoxide in binding to sensors.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: November 3, 2009
    Assignee: Aperon Biosystems Corp.
    Inventors: David J. Anvar, David J. Chazan, Bryan P. Flaherty, Bhairavi R. Parikh
  • Patent number: 7481975
    Abstract: The present invention provides a hydrogen peroxide indicator that includes a substrate on which is disposed an indicator composition that includes at least one of a select group of colorants. As a result of contact with hydrogen peroxide, the colorants change color, and even become colorless, thereby providing an indication of the presence of hydrogen peroxide.
    Type: Grant
    Filed: July 14, 2004
    Date of Patent: January 27, 2009
    Assignee: 3M Innovative Properties Company
    Inventor: David M. Read
  • Publication number: 20080267825
    Abstract: A gas detecting apparatus includes a plate including a first reactive surface and a second reactive surface each coated with a chemical reagent which is capable of causing a color reaction with a particular gas, a protective member covering the first reactive surface, a transparent protective member covering the second reactive surface, a protective package enclosing therein the plate with the first reactive surface covered with the protective member and the second reactive surface covered with the transparent protective member, and a connector connecting the protective member and the protective package to each other.
    Type: Application
    Filed: January 25, 2008
    Publication date: October 30, 2008
    Applicant: NEC CORPORATION
    Inventors: Toshihiro Ogasawara, Yoshihiro Asakawa
  • Patent number: 7368153
    Abstract: The present invention relates to the non-invasive use of a luminescent compound to detect and measure concentrations of oxygen dissolved in a rigid container, especially a bottle, a tray, a carton, a lidstock associated with a tray, a stand up pouch, or a paperboard container. The measurement is made independent of the oxygen concentration of the surrounding atmosphere. The invention is especially useful as a quality assurance check to verify oxygen scavenger activation during the assembly of bottled products, and modified atmosphere and vacuum packages. The method according to the invention is faster and less wasteful than previous methods that rely on measuring oxygen concentration within the headspace of an assembled package.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: May 6, 2008
    Assignee: Cryovac, Inc.
    Inventors: Charles R. Barmore, Drew V. Speer, Thomas D. Kennedy, Marvin R. Havens
  • Patent number: 7364700
    Abstract: A sensing element in which a dye that changes in the light absorption characteristic of the visible region upon reaction with ozone gas is deposited in the pores of a porous material is prepared. A change in dye before and after exposing the sensing element to a measurement environment for a predetermined time is measured. The ozone gas amount in measurement target air is measured on the basis of the change in dye.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: April 29, 2008
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yasuko Maruo, Shigeo Ogawa, Seizou Sakata, Tohru Tanaka
  • Patent number: 7297549
    Abstract: A method of determining bias in a measurement of a constituent concentration level in a sample gas is provided. The method comprises establishing a sample gas flow from an emission stream into a sample gas line of an emissions monitoring system. The method further comprises removing water from the sample gas flow and cooling the sample gas flow to a temperature below about 41° F. to produce a cooled, dried sample gas flow. The constituent concentration level is then determined for the cooled, dried sample gas flow. The method further comprises introducing a span gas having a known span gas constituent concentration level into the sample gas flow to form a combined sample and span gas flow, the span gas being introduced at a desired span gas flow rate. The method still further comprises removing water from the combined sample and span gas and cooling the combined sample and span gas to a temperature below about 41° F. to produce a cooled, dried, combined sample and span gas flow.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: November 20, 2007
    Assignee: General Electric Company
    Inventors: William Steven Lanier, Glenn England
  • Patent number: 7262061
    Abstract: Test element analysis system for the analytical investigation of a sample, in particular of a body liquid of human beings or animals, comprising test elements (2) with a carrier film (5) and a test field (7) fixed to the flat side (6) of the carrier film (5), the test field (7) containing a reagent system the reaction of which with the sample (21) leads to an optically measurable change in the detection zone (24) which is characteristic for the analysis, and an evaluation instrument with a measuring device for measuring the optically measurable change.
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: August 28, 2007
    Assignee: Roche Diagnostics GmbH
    Inventors: Wolfgang Petrich, Wilfried Schmid, Gerrit Kocherscheidt, Jean-Michel Asfour
  • Patent number: 7188538
    Abstract: The invention disclosed herein relates generally to mailpieces and more particularly, a hazardous material detector for detecting hazardous material in a mail stream. The present invention is directed, in general to detector for collecting sample (s) of hazardous materials from a mail processing device. The mailpiece generally comprises an envelope comprising a front side and a back side; holes formed in at least one of the front side or the back side of the envelope; a hazardous material test strip for detecting the presence of hazardous material in contact with the test strip; whereby when hazardous materials are detected by the hazardous material test strip a physical change occurs to the hazardous material test strip and the physical change can be viewed through at least one hole formed in the at least one of the front side or the back side of the envelope. The detector helps to quickly determine whether hazardous materials are present in the mail stream.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: March 13, 2007
    Assignee: Pitney Bowes Inc.
    Inventor: Christian A. Beck
  • Patent number: 7189355
    Abstract: The present invention relates to a chemical indicator that is used to determine whether instruments and other products to be sterilized have experienced a sterilization treatment process or to confirm whether sterilization has been efficiently performed, by the color tone change of the indicator when sterilizing medical instruments and other products and the like by a hydrogen peroxide low temperature plasma sterilizing method. The present invention provides an indicator for plasma sterilization, wherein an ink comprising a colorless chromogenic pigment, a coloring assistant, a binder (a binding agent) and a solvent for dissolving these, is applied to or printed on a base material, and wherein a color tone change of the indicator occurs by a hydrogen peroxide low temperature sterilization method.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: March 13, 2007
    Inventors: Masao Mikumo, Kenji Kazama, Yoshio Jo
  • Patent number: 7185601
    Abstract: A chemically sensitive warning apparatus capable of changing colors upon contact with a chemical is disclosed. The apparatus preferably comprises an elongated tape having opposed, first and second major surfaces and warning indicia visible to an individual viewing the first surface to provide visual indication of possible danger or hazardous condition. Mounted to the tape is at least one chemical indicator that is responsive to the presence of at least one chemical by changing colors so as to provide a visual indication of the exposure of the indicator to the chemical. The tape may also include at least one color reference indicia to facilitate interpretation of the color of the chemical indicator when the chemical indicator changes color upon exposure to the chemical.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: March 6, 2007
    Assignee: Micron Technology, Inc.
    Inventors: Craig M. Carpenter, Allen P. Mardian, Philip H. Campbell, Ross S. Dando
  • Patent number: 7141214
    Abstract: Water-based chemical indicator inks for ethylene oxide sterilization processes and methods for its use. The chemical indicator ink contains at least one pH indicator dye selected from the group consisting of Bromocresol green, Bromophenol blue, Methyl red, Ethyl orange, and combinations thereof. The pH indicator dye undergoes an irreversible color change when exposed to ethylene oxide vapor in the presence of low-temperature steam, but when exposed to other sterilization processes either does not undergo a color change or undergoes a color change that is different than is obtained when exposed to ethylene oxide.
    Type: Grant
    Filed: June 29, 2004
    Date of Patent: November 28, 2006
    Assignee: Illinois Tool Works Inc.
    Inventor: Shobha Shakher Puntambekar
  • Patent number: 7022285
    Abstract: An integral multilayer analytical element for analysis of ammonia or ammonia-producing substance is provided, which comprises a thin liquid blocking layer having a comparative facility with a thicker liquid blocking layer and is stably fabricated on a common production line employed for different type of slides. In the integral multilayer analytical element for analysis of ammonia or ammonia-producing substance comprising a transparent support, an indicator layer containing an indicator which produces a detectable change by gaseous ammonia, a liquid blocking layer permitting a gaseous ammonia to pass through, a reagent layer containing an alkaline buffering agent and optionally a reagent capable of reacting with said ammonia-producing substance to produce ammonia, and a spreading layer, adhesively laminated in this order, the improvement which comprises that said liquid blocking layer is composed of at least two porous membranes.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: April 4, 2006
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takaki Arai, Fuminori Arai, Keiichi Ishizaki
  • Patent number: 7014816
    Abstract: A food quality indicator device an indicator compound provided on a substrate. The indicator compound changes color due to the presence of volatile compounds, such as volatile bases, in spoiled food, even when the food is frozen. Alternatively, the indicator compound detects the presence of an unwanted amine-producing biological agent, such as bacteria or fungi. The indicator compound is typically contained within a polymeric matrix disposed on the substrate. Examples of suitable indicator compounds include halogenated azo dyes, sulfonated xanthene dyes, and sulfonated hydroxy-functional triphenylmethane dyes.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: March 21, 2006
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventors: Dwight W. Miller, Jon G. Wilkes, Eric D. Conte
  • Patent number: 6852281
    Abstract: The invention designed to provide a gas indicator which can be applied over a broad range of gas concentration from a low concentration gas to a high concentration gas is concerned with a gas indicator comprising a housing and a change-color gas sensor element with which the housing is loaded, the housing internally defining a gas passage space extending from its gate through its bottom with the area of its cross-section parallel to the plane of the gate being progressively reduced from the gate to the bottom.
    Type: Grant
    Filed: June 29, 2001
    Date of Patent: February 8, 2005
    Assignee: Sakura Color Products Corporation
    Inventors: Hiroshi Inoue, Satoshi Maruyama, Masahiro Yasunaga
  • Patent number: 6773925
    Abstract: There are provided a detector agent which is effectively discolored at a lower concentration for various halogen compounds and a method for detecting halogen compounds by use of said detector agent. A detector agent for halogen compounds, which contains curcumin or Bromocresol Green as a discoloring component, and said discoloring component is preferably supported on granular activated alumina.
    Type: Grant
    Filed: January 24, 2001
    Date of Patent: August 10, 2004
    Assignees: L'Air Liquide Societe Anonyme a Directoire et Conseil de Surveillance Pour l'Etude et l'Exploitation des Procedes Georges Claude, Air Liquide Electronics Systems
    Inventors: Yoshihiro Ibaraki, Hideji Kawanaka, Hidekazu Ina, Shinichi Ando
  • Patent number: 6706537
    Abstract: A sterilization monitor includes a substrate and an monitor composition. The monitor composition contains a colorant and a halogen source and undergoes a distinct color change when exposed to a peracid. The sterilization monitor can be used to monitor a sterilization process involving a peracid. A sterilization monitoring device, including a sterilization monitor enclosed in a housing having a vapor permeable barrier, can also be used to monitor a sterilization process.
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: March 16, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: Ramon T. Ignacio, Allan P. Piechowski
  • Patent number: 6651487
    Abstract: A reactive test strip having a pre-exposure color is used to measure and indicate the concentration of copper ions in brake fluid in terms of a readily visible color change. The strip is immersed in the fluid within a brake fluid container and any resulting color change is compared to a color chart and a known test standard representative of the maximum metal concentration determined empirically to correspond to a boiling point considered safe for normal operation. If the color change indicates a higher copper concentration than the known test standard, then the fluid is considered inadequate for safe operation and thus recommended for replacement without any further tests. Similar copper or metal strips can also be used in a similar test to determine iron or zinc concentration within the brake fluid so as to also determine suitability of the brake fluid for ensuring safe operation.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: November 25, 2003
    Assignee: Phoenix Systems, L.L.C.
    Inventor: Jon A. Petty
  • Patent number: 6584826
    Abstract: Apparatus for testing the quality of air in sources of compressed air in which a housing forms an elongated bore closed at one end by an elastomeric bag or balloon and at the other end by a check valve to form a chamber to hold a test strip which is chemically treated to change color or characteristics when air contaminants are present. The air to be tested is introduced through the valve to inflate the balloon and maintain the test strip under air pressure where it can be viewed through a transparent portion of the housing.
    Type: Grant
    Filed: August 6, 2001
    Date of Patent: July 1, 2003
    Inventors: William B. Stephenson, Craig W. Stephenson
  • Patent number: 6479018
    Abstract: Detection of an evolving or diffusing gaseous substance emanating from an irradiated or thermolyzed layer of polymeric composition in semiconductor processing or similar processes is disclosed. The evolving or diffusing gaseous substance is detected by spatially disposing from the irradiated or thermolyzed layer a detector layer that includes a compound having leaving groups that are sensitive to the gaseous substance being detected.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: November 12, 2002
    Assignee: International Business Machines Corporation
    Inventors: James Patrick Collins, Laird Chandler MacDowell, Wayne Martin Moreau, Michael Santarelli
  • Patent number: 6444473
    Abstract: An ozone detector in the form of two basic embodiments which can measure ozone concentration in ambient air at 0.001-1 ppm. The first embodiment includes a stretched elastic material and a standard which can give ozone concentration in response to degree of microcracking or frosting of the elastic material. The second embodiment includes a chamber containing a long strip of elastic material, a component for stretching the material, a light source for generating a light and illuminating the film and a detector for detecting reflected, transmitted through or scattered light by the material.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: September 3, 2002
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Charles M. Roland, Peter H. Mott
  • Patent number: 6368867
    Abstract: The present invention provides an ozone processing monitor and a method of using the same in ozone processing to determine whether sufficient ozone treatment has occurred on a production part needing ozone treatment. The ozone processing monitor of the present invention comprises an ozone sensitive material which is capable of thinning, bleaching, forming an oxide layer or undergoing any other physical or chemical change upon exposure to ozone, wherein said physical or chemical change produces a visible color change of said ozone sensitive material which can be monitored during or following ozone processing. The color change of the ozone sensitive material can be compared to standards to determine if too little, too much or appropriate ozone treatment has occurred.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: April 9, 2002
    Assignee: International Business Machines Corporation
    Inventors: Margaret Lecko Gibson, John James Lajza, Jr., Harold George Linde
  • Patent number: 6362005
    Abstract: In this invention, a mixture of a diazotizing reagent which reacts with nitrous ions to produce a diazo compound, a coupling reagent which couples with a diazo compound to produce an azo dye, and an acid is placed in pores of a transparent porous body to prepare a sensor element. Nitrogen dioxide gas is sensed in accordance with a color change before and after the sensor element is exposed to air to be measured for a predetermined time.
    Type: Grant
    Filed: August 24, 1998
    Date of Patent: March 26, 2002
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Tohru Tanaka, Takayoshi Hayashi, Shiro Matsumoto, Yasuko Maruo, Takashi Ohyama
  • Patent number: 6348355
    Abstract: A testing elements for the calorimetric determination of oxidizable gas and/or vapor components in gas mixtures is provided. The testing element contains, besides usual oxidizing agents, at least one redox indicator, which is in the oxidized form. The redox indicator is preferably a benzidine derivative according to the general formula in which the radicals R are identical or different and denote a hydrogen, alkyl, aryl, halogen, trifluoromethyl, cyano, nitro, dialkylamino, ester, sulfoxyl ester, alkyloxy or aryloxy, X denotes a halogen, Y denotes a trifluoromethyl, cyano, nitro, dialkylamino, ester, sulfoxyl ester, alkyloxy or aryloxy, n is an integer from zero to three, and m equals 5−n. The testing elements are preferably designed as detector tubes that contain carrier materials, to which the oxidizing reagents and redox indicators are applied.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: February 19, 2002
    Assignee: Dräger Sicherheitstechnik GmbH
    Inventors: Wolfgang Bäther, Ralf Miethchen, Alexej Miller
  • Patent number: 6287518
    Abstract: A sterilization monitor includes a substrate and an monitor composition. The monitor composition contains a colorant and a halogen source and undergoes a distinct color change when exposed to a peracid. The sterilization monitor can be used to monitor a sterilization process involving a peracid. A sterilization monitoring device, including a sterilization monitor enclosed in a housing having a vapor permeable barrier, can also be used to monitor a sterilization process.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: September 11, 2001
    Assignee: 3M Innovative Properties Company
    Inventors: Ramon T. Ignacio, Allan P. Piechowski
  • Patent number: 6284198
    Abstract: A self-appearing warning sign device and method for the manufacture of a self-appearing warning sign device including a relatively thin gas impermeable support member upon which a coating is superimposed having a composition containing one or more chromographic reagents which will cause a visible color change in the presence of a specified polluting gas. The coating has a raised thickness of between about 5-500 microns. A warning sign of defined shape is formed depositing the coating composition in a given shape identifying the presence of the polluting gas or by masking a given area to form said shape. The device also includes a hydrophobic layer and end covers in an arrangement forming a gas tight sealed enclosure except for an opening in each cover on opposite ends of the device.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: September 4, 2001
    Assignee: K&M Environmental Inc.
    Inventors: Kirollos Salama Kirollos, Gueorgui Milev Mihaylov