Patents Assigned to Quidel
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Publication number: 20090263854Abstract: A laminated, integrated, analyte assay device and methods of using the device are described. The assay device is useful as an inexpensive, disposable assay device for detecting the presence and/or amount of a particular analyte in a body fluid or other sample.Type: ApplicationFiled: April 21, 2009Publication date: October 22, 2009Applicant: Quidel CorporationInventors: Bruce Jacono, John C. Barry
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Publication number: 20090215159Abstract: An apparatus for detection of an analyte of interest in a solid, semi-solid, or liquid biological sample, using a lateral flow assay test strip, is described. The apparatus minimizes sample handling and manipulation upon introduction of the sample into a sample-receiving chamber and transfer of the sample to a test chamber containing the assay strip.Type: ApplicationFiled: February 20, 2009Publication date: August 27, 2009Applicant: Quidel CorporationInventor: Kevin J. Kirby
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Patent number: 7553675Abstract: A test device and method for determining the presence or absence of one or more analytes in a fluid sample, the test device including a support or member bearing a mark thereon, and a matrix or member containing a capture zone. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (?) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (?) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.Type: GrantFiled: January 11, 2007Date of Patent: June 30, 2009Assignee: Quidel CorporationInventors: Jeremy Jerome, Mark Daquipa, Bruce Jacono, Hans Boehringer, Paul Lambotte, Paul J. Lawrence
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Patent number: 7537937Abstract: A test device and method for determining the presence or absence of an analyte in a fluid sample, the test device including a support bearing a mark thereon, and a matrix defining an axial flow path. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (?) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (?) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.Type: GrantFiled: June 1, 2007Date of Patent: May 26, 2009Assignee: Quidel CorporationInventors: Jeremy Jerome, Mark Daquipa, Bruce Jacono, Hans Boehringer
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Patent number: 7491551Abstract: This invention provides solid phase specific binding lateral flow assay methods, devices and kits for quantitating high and low molecular weight analytes. The methods and devices of the invention employ labelled reagents which are either analyte analogs or complementary specific binding pair members for the analyte and a novel arrangement of capture zones comprising immobilized specific binding substances for either the analyte or the labelled reagent to effect bound from unbound labelled reagent as a function of analyte concentration. The capture zones are disposed on a non-bibulous matrix defining a flow path from a sample receiving zone to the capture zone. The devices of this invention also include multilane flow paths and multiple capture zones to quantitate analyte.Type: GrantFiled: November 8, 2006Date of Patent: February 17, 2009Assignee: Quidel CorporationInventors: Hans Boehringer, Gerald Rowley, Allan D. Pronovost
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Publication number: 20080032411Abstract: Laminated test devices in which positive results are detected by the appearance of a symbol on the surface of the device due to a color change in an indicator in the device are improved by placing the indicator lamina on one side of a light-transmissive substrate sheet and a pigment lamina on the other side, the indicator lamina forming the icon and the pigment lamina forming the background, the pigment being the color of the indicator prior to the color change. This arrangement reduces false positive readings by obscuring the outlines of the symbol prior to the color change. False negative readings are reduced by further changes in the arrangement of the laminae.Type: ApplicationFiled: July 6, 2007Publication date: February 7, 2008Applicant: Quidel CorporationInventors: Paul Lawrence, Aulena Chaudhuri
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Publication number: 20080026417Abstract: The release by trichomonads of a hydrolase that hydrolyzes a narrowly defined class of substrates at a low pH without interference from hydrolases that are unrelated to trichomoniasis is the basis for a selective diagnostic assay for trichomoniasis that measures hydrolysis of any of these substrates by vaginal fluid at a low pH. Selective assays for trichomoniasis are also obtained by removing particulate matter from a sample of vaginal fluid to extract a fraction devoid of particles greater than a selected size, and where desired, combining the extracted fraction with any of certain specified hydrolase inhibitors, then testing the fraction for enzymatic hydrolase activity. These qualities of trichomoniasis are the basis for a series of diagnostic tests and test devices that produce results that are detectable by visual and other means with a high degree of accuracy.Type: ApplicationFiled: August 13, 2007Publication date: January 31, 2008Applicant: Quidel CorporationInventors: Paul Lawrence, Mark Hughes, Aulena Chaudhuri, Terrence Andreasen
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Publication number: 20070281370Abstract: A test device and method for determining the presence or absence of an analyte in a fluid sample, the test device including a support bearing a mark thereon, and a matrix defining an axial flow path. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (?) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (?) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.Type: ApplicationFiled: June 1, 2007Publication date: December 6, 2007Applicant: Quidel CorporationInventors: Jeremy Jerome, Mark Daquipa, Bruce Jacono, Hans Boehringer
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Patent number: 7291481Abstract: The release by trichomonads of a hydrolase that hydrolyzes a narrowly defined class of substrates at a low pH without interference from hydrolases that are unrelated to trichomoniasis is the basis for a selective diagnostic assay for trichomoniasis that measures hydrolysis of any of these substrates by vaginal fluid at a low pH. Selective assays for trichomoniasis are also obtained by removing particulate matter from a sample of vaginal fluid to extract a fraction devoid of particles greater than a selected size, and where desired, combining the extracted fraction with any of certain specified hydrolase inhibitors, then testing the fraction for enzymatic hydrolase activity. These qualities of trichomoniasis are the basis for a series of diagnostic tests and test devices that produce results that are detectable by visual and other means with a high degree of accuracy.Type: GrantFiled: February 13, 2006Date of Patent: November 6, 2007Assignee: Quidel CorporationInventors: Paul J. Lawrence, Mark A. Hughes, Aulena Chaudhuri, Terrence J. Andreasen
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Patent number: 7255832Abstract: Laminated test devices in which positive results are detected by the appearance of a symbol on the surface of the device due to a color change in an indicator in the device are improved by placing the indicator lamina on one side of a light-transmissive substrate sheet and a pigment lamina on the other side, the indicator lamina forming the icon and the pigment lamina forming the background, the pigment being the color of the indicator prior to the color change. This arrangement reduces false positive readings by obscuring the outlines of the symbol prior to the color change. False negative readings are reduced by further changes in the arrangement of the laminae.Type: GrantFiled: September 17, 2004Date of Patent: August 14, 2007Assignee: Quidel CorporationInventors: Paul J. Lawrence, Aulena Chaudhuri
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Patent number: 7226793Abstract: A test device and method for determining the presence or absence of an analyte in a fluid sample, the test device including a support bearing a mark thereon, and a matrix defining an axial flow path. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (?) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (?) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.Type: GrantFiled: June 12, 2003Date of Patent: June 5, 2007Assignee: Quidel CorporationInventors: Jeremy Jerome, Mark Daquipa, Bruce Jacono, Hans Boehringer
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Publication number: 20070111323Abstract: A test device and method for determining the presence or absence of one or more analytes in a fluid sample, the test device including a support or member bearing a mark thereon, and a matrix or member containing a capture zone. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (?) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (?) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.Type: ApplicationFiled: January 11, 2007Publication date: May 17, 2007Applicant: Quidel CorporationInventors: Jeremy Jerome, Mark Daquipa, Bruce Jacono, Hans Boehringer, Paul Lambotte, Paul Lawrence
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Patent number: 7179657Abstract: A test device and method for determining the presence or absence of one or more analytes in a fluid sample, the test device including a support or member bearing a mark thereon, and a matrix or member containing a capture zone. In operation, an observation area in the test device becomes transparent, thereby allowing the user to view a mark that is present on a support that is disposed beneath the observation area. Typically, the mark on the underlying support is configured as a minus (?) sign. In the absence of analyte in the sample, the test device presents a negative result as a minus (?) signal. In the presence of analyte in the sample, however, the mark operates in concert with a perpendicular test line on the observation area to present a positive result as a plus (+) signal that is visible to the user.Type: GrantFiled: September 10, 2002Date of Patent: February 20, 2007Assignee: Quidel CorporationInventors: Jeremy Jerome, Mark Daquipa, Bruce Jacono, Hans Boehringer, Paul Lambotte, Paul J. Lawrence
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Patent number: 7144742Abstract: This invention provides solid phase specific binding lateral flow assay methods, devices and kits for quantitating high and low molecular weight analytes. The methods and devices of the invention employ labelled reagents which are either analyte analogs or complementary specific binding pair members for the analyte and a novel arrangement of capture zones comprising immobilized specific binding substances for either the analyte or the labelled reagent to effect bound from unbound labelled reagent as a function of analyte concentration. The capture zones are disposed on a non-bibulous matrix defining a flow path from a sample receiving zone to the capture zone. The devices of this invention also include multilane flow paths and multiple capture zones to quantitate analyte.Type: GrantFiled: December 17, 2004Date of Patent: December 5, 2006Assignee: Quidel CorporationInventors: Hans Boehringer, Gerald Rowley, Allan D. Pronovost
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Publication number: 20060127969Abstract: The release by trichomonads of a hydrolase that hydrolyzes a narrowly defined class of substrates at a low pH without interference from hydrolases that are unrelated to trichomoniasis is the basis for a selective diagnostic assay for trichomoniasis that measures hydrolysis of any of these substrates by vaginal fluid at a low pH. Selective assays for trichomoniasis are also obtained by removing particulate matter from a sample of vaginal fluid to extract a fraction devoid of particles greater than a selected size, and where desired, combining the extracted fraction with any of certain specified hydrolase inhibitors, then testing the fraction for enzymatic hydrolase activity. These qualities of trichomoniasis are the basis for a series of diagnostic tests and test devices that produce results that are detectable by visual and other means with a high degree of accuracy.Type: ApplicationFiled: February 13, 2006Publication date: June 15, 2006Applicant: Quidel CorporationInventors: Paul Lawrence, Mark Hughes, Aulena Chaudhuri, Terrence Andreasen
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Patent number: 7041469Abstract: The release by trichomonads of a hydrolase that hydrolyzes a narrowly defined class of substrates at a low pH without interference from hydrolases that are unrelated to trichomoniasis is the basis for a selective diagnostic assay for trichomoniasis that measures hydrolysis of any of these substrates by vaginal fluid at a low pH. Selective assays for trichomoniasis are also obtained by removing particulate matter from a sample of vaginal fluid to extract a fraction devoid of particles greater than a selected size, and where desired, combining the extracted fraction with any of certain specified hydrolase inhibitors, then testing the fraction for enzymatic hydrolase activity. These qualities of trichomoniasis are the basis for a series of diagnostic tests and test devices that produce results that are detectable by visual and other means with a high degree of accuracy.Type: GrantFiled: October 10, 2002Date of Patent: May 9, 2006Assignee: Quidel CorporationInventors: Paul J. Lawrence, Mark A. Hughes, Aulena Chaudhuri, Terrence J. Andreasen
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Publication number: 20060078986Abstract: The present invention provides analytical devices comprising primary and secondary flow paths. A secondary flow path is configured to allow for a portion of a liquid sample to enter the secondary flow path from a primary flow path and subsequently be drawn back into the primary flow path, thereby providing sequential delivery of a portion of the sample to downstream locations.Type: ApplicationFiled: September 30, 2005Publication date: April 13, 2006Applicant: Quidel CorporationInventors: Peter Ly, Rajesh Mehra, Catherine Pawlak, Romy Meris, Jan Pawlak
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Publication number: 20050227371Abstract: The invention relates to devices for performing single step assays for the determination of the presence or absence of an analyte in a liquid sample, and methods of determining the presence or absence of such analytes using such devices. Devices disclosed comprise a labeled analyte-binding reagent reversibly-immobilized on a non-porous solid material, which solid material is in physical contact with a dry porous carrier bearing an immobilized analyte-binding reagent. Also provided are quantitative assay devices.Type: ApplicationFiled: March 23, 2005Publication date: October 13, 2005Applicant: Quidel CorporationInventor: Cem Gokhan
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Patent number: 6924153Abstract: This invention provides solid phase specific binding lateral flow assay methods, devices and kits for quantitating high and low molecular weight analytes. The methods and devices of the invention employ labelled reagents which are either analyte analogs or complementary specific binding pair members for the analyte and a novel arrangement of capture zones comprising immobilized specific binding substances for either the analyte or the labelled reagent to effect bound from unbound labelled reagent as a function of analyte concentration. The capture zones are disposed on a non-bibulous matrix defining a flow path from a sample receiving zone to the capture zone. The devices of this invention also include multilane flow paths and multiple capture zones to quantitate analyte.Type: GrantFiled: March 6, 1997Date of Patent: August 2, 2005Assignee: Quidel CorporationInventors: Hans Boehringer, Gerald Rowley, Allan Pronovost
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Publication number: 20050070021Abstract: Laminated test devices in which positive results are detected by the appearance of a symbol on the surface of the device due to a color change in an indicator in the device are improved by placing the indicator lamina on one side of a light-transmissive substrate sheet and a pigment lamina on the other side, the indicator lamina forming the icon and the pigment lamina forming the background, the pigment being the color of the indicator prior to the color change. This arrangement reduces false positive readings by obscuring the outlines of the symbol prior to the color change. False negative readings are reduced by further changes in the arrangement of the laminae.Type: ApplicationFiled: September 17, 2004Publication date: March 31, 2005Applicant: QUIDEL CORPORATION, a Delaware corporationInventors: Paul Lawrence, Aulena Chaudhuri