Patents by Inventor Keith May
Keith May has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6818455Abstract: An analytical test device useful for example in pregnancy testing, comprises a hollow casing (500) constructed of moisture-impervious solid material, such as; plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, and in a second zone spatially distinct from the first zone unlabelled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilised on the carrier material and is therefore not mobile in the moist state, the two zones being arranged such that liquid sample applied to the porous carrier can permeate via the first zone into the second zone, and the device incorporating meType: GrantFiled: February 28, 2001Date of Patent: November 16, 2004Assignee: Inverness Medical Switzerland GmbHInventors: Keith May, Michael Evans Prior, Ian Richards
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Publication number: 20040114025Abstract: A method for repositioning a mark on a belt after an image on paper registration process, which includes printing a test pattern, measuring at least one test pattern parameter, detecting a mark on a belt and detecting at least one imaging error associated therewith, using the at least one test pattern parameter and the at least one imaging error to determine the lateral distance required to shift a particular image to a desired location on the belt and shifting the image to the desired location.Type: ApplicationFiled: July 30, 2003Publication date: June 17, 2004Applicant: Xerox CorporationInventors: David M. Kerxhalli, Keith A. May, Brian R. Conrow, Michael J. Martin, Michael J. Thomas
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Publication number: 20030219908Abstract: An analytical test device incorporating a dry porous carrier to which a liquid sample, eg. urine, suspected of containing an analyte such as HCG or LH can be applied indirectly, the device also incorporating a labelled specific binding reagent which is freely mobile in the porous carrier when in the moist state, and an unlabelled specific binding reagent which is permanently immobilised in a detection zone on the carrier material, the labelled and unlabelled specific binding reagents being capable of participating in either a sandwich reaction or a competition reaction in the presence of the analyte, in which prior to the application to the device of a liquid sample suspected of containing the analyte, the labelled specific binding reagent is retained in the dry state in a macroporous body, eg.Type: ApplicationFiled: December 23, 2002Publication date: November 27, 2003Inventors: Paul James Davis, Michael Evans Prior, Keith May
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Publication number: 20030207465Abstract: An analytical test device incorporating a dry porous carrier to which a liquid sample, eg. urine, suspected of containing an analyte such as HCG or LH can be applied indirectly, the device also incorporating a labelled specific binding reagent which is freely mobile in the porous carrier when in the moist state, and an unlabelled specific binding reagent which is permanently immobilised in a detection zone on the carrier material, the labelled and unlabelled specific binding reagents being capable of participating in either a sandwich reaction or a competition reaction in the presence of the analyte, in which prior to the application to the device of a liquid sample suspected of containing the analyte, the labelled specific binding reagent is retained in the dry state in a macroporous body, eg.Type: ApplicationFiled: September 4, 2001Publication date: November 6, 2003Applicant: Unilever Patent Holdings B.VInventors: Paul James Davis, Michael Evans Prior, Keith May
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Publication number: 20030143755Abstract: An analytical test device incorporating a dry porous carrier to which a liquid sample, eg. urine, suspected of containing an analyte such as HCG or LH can be applied indirectly, the device also incorporating a labelled specific binding reagent which is freely mobile in the porous carrier when in the moist state, and an unlabelled specific binding reagent which is permanently immobilised in a detection zone on the carrier material, the labelled and unlabelled specific binding reagents being capable of participating in either a sandwich reaction or a competition reaction in the presence of the analyte, in which prior to the application to the device of a liquid sample suspected of containing the analyte, the labelled specific binding reagent is retained in the dry state in a macroporous body, eg.Type: ApplicationFiled: December 23, 2002Publication date: July 31, 2003Inventors: Paul James Davis, Michael Evans Prior, Keith May
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Publication number: 20020137220Abstract: A method of providing warning of the onset of the fertile phase of the human ovulation cycle, involving measurement in absolute or relative terms of the body fluid concentration of an analyte such as estradiol or a metabolite thereof wherein if in the current cycle a concentration measurement conducted at about the termination of menses reveals a body fluid concentration that is typical of that found in the body fluid of an average human female subject about 3 days prior to the time of ovulation during a 28-day cycle, the current cycle is immediately declared to be in its fertile phase. Where the analyte is E3G, the E3G concentration measurement is conducted on at least one or numerical days 4 to 7 of the current cycle, counting from the onset of menses, and the fertile phase is declared immediately if the E3G measurement reveals a concentration equal to or greater than a threshold concentration chosen in the range of about 25 to about 35 ng/ml.Type: ApplicationFiled: March 8, 2002Publication date: September 26, 2002Applicant: Inverness Medical Switzerland GmbHInventors: Michael Catt, Keith May
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Patent number: 6403380Abstract: A method of providing warning of the onset of the fertile phase of the human ovulation cycle, involving measurement in absolute or relative terms of the body fluid concentration of an analyte such as estradiol or a metabolite thereof wherein if in the current cycle a concentration measurement conducted at about the termination of menses reveals a body fluid concentration that is typical of that found in the body fluid of an average human female subject about 3 days prior to the time of ovulation during a 28-day cycle, the current cycle is immediately declared to be in its fertile phase. Where the a analyte is E3G, the E3G concentration measurement is conducted on at least one or numerical days 4 to 7 of the current cycle, counting from the onset of menses, and the fertile phase is declared immediately if the E3G measurement reveals a concentration equal to or greater than a threshold concentration chosen in the range of about 25 to about 35 ng/ml.Type: GrantFiled: February 18, 1997Date of Patent: June 11, 2002Assignee: Inverness Medical Switzerland GmbHInventors: Michael Catt, Keith May
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Patent number: 6352862Abstract: An analytical test device incorporating a dry porous carrier to which a liquid sample, eg. urine, suspected of containing an analyte such as HCG or LH can be applied indirectly, the device also incorporating a labelled specific binding reagent which is freely mobile in the porous carrier when in the moist state, and an unlabelled specific binding reagent which is permanently immobilised in a detection zone on the carrier material, the labelled and unlabelled specific binding reagents being capable of participating in either a sandwich reaction or a competition reaction in the presence of the analyte, in which prior to the application to the device of a liquid sample suspected of containing the analyte, the labelled specific binding reagent is retained in the dry state in a macroporous body, eg.Type: GrantFiled: June 9, 1997Date of Patent: March 5, 2002Assignee: Unilever Patent Holdings B.V.Inventors: Paul James Davis, Michael Evans Prior, Keith May
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Publication number: 20010041368Abstract: An analytical test device useful for example in pregnancy testing, comprises a hollow casing (500) constructed of moisture-impervious solid material, such as; plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, and in a second zone spatially distinct from the first zone unlabelled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilised on the carrier material and is therefore not mobile in the moist state, the two zones being arranged such that liquid sample applied to the porous carrier can permeate via the first zone into the second zone, and the device incorporating meType: ApplicationFiled: February 28, 2001Publication date: November 15, 2001Applicant: Conopco Inc.Inventors: Keith May, Michael Evans Prior, Ian Richards
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Publication number: 20010008774Abstract: An analytical test device useful for example in pregnancy testing, comprises a hollow casing (500) constructed of moisture-impervious solid material, such as plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, and in a second zone spatially distinct from the first zone unlabelled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilised on the carrier material and is therefore not mobile in the moist state, the two zones being arranged such that liquid sample applied to the porous carrier can permeate via the first zone into the second zone, and the device incorporating meaType: ApplicationFiled: February 12, 2001Publication date: July 19, 2001Applicant: Conopco Inc.Inventors: Keith May, Michael Evans Prior, Ian Richards
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Patent number: 6228660Abstract: An analytical test device useful for example in pregnancy testing, comprises a hollow casing (500) constructed of moisture-impervious solid material, such as plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, and in a second zone spatially distinct from the first zone unlabelled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilized on the carrier material and is therefore not mobile in the moist state, the two zones being arranged such that liquid sample applied to the porous carrier can permeate via the first zone into the second zone, and the device incorporating meaType: GrantFiled: June 7, 1995Date of Patent: May 8, 2001Assignee: Conopco Inc.Inventors: Keith May, Michael Evans Prior, Ian Richards
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Patent number: 6187598Abstract: An analytical test device useful for example in pregnancy testing, comprises a hollow casing (500) constructed of moisture-impervious solid material, such as plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, and in a second zone spatially distinct from the first zone unlabelled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilised on the carrier material and is therefore not mobile in the moist state, the two zones being arranged such that liquid sample applied to the porous carrier can permeate via the first zone into the second zone, and the device incorporating meaType: GrantFiled: June 7, 1995Date of Patent: February 13, 2001Assignee: Conopco Inc.Inventors: Keith May, Michael Evans Prior, Ian Richards
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Patent number: 6167217Abstract: An image processing control system which employs a patch schedule processor that schedules the writing of patches to the photoreceptor belt on demand in response to adjustments generated by prior cycles of image process control.Type: GrantFiled: December 6, 1999Date of Patent: December 26, 2000Assignee: Xerox CorporationInventors: Dawn Marie Kelsch, Ragni Mehta, Keith A. May, Douglas Brian Chlebove
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Patent number: 6156271Abstract: An assay device incorporates a composite strip comprising at least two bodies of porous liquid-conductive material in liquid-flow contact with each other via an interface and together defining at least part of a liquid flow path through which liquid must flow during the performance of an assay, wherein at said interface the lateral dimension, relative to the direction of the liquid flow path, of the contact area of the upstream body is narrowed such that liquid flow from the upstream body into the downstream body is focused towards the centre-line of the flow path in the downstream body, thereby reducing the likelihood that liquid will deviate from the intended flow path. The upstream body can be a sample-collecting wick, terminating at the interface as a point or prow (FIG. 7).Type: GrantFiled: February 17, 1998Date of Patent: December 5, 2000Assignee: Unilever Patent Holdings B.V.Inventor: Keith May
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Patent number: 5656503Abstract: An analytical test device useful for example in pregnancy testing, comprises a hollow casing (500) constructed of moisture-impervious solid material, such as plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, wherein the mobility is facilitated by a material comprising a sugar, in an amount effective to reduce interaction between the test strip and the labelled reagent, and in a second zone spatially distinct from the first zone unlabelled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilised on the carrier material and is therefore not mobile in the moist state, the tType: GrantFiled: September 15, 1994Date of Patent: August 12, 1997Assignee: Unilever Patent Holdings B.V.Inventors: Keith May, Michael Evans Prior, Ian Richards
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Patent number: 5622871Abstract: An analytical test device useful for example in pregnancy testing, includes a hollow casing (500) constructed of moisture-impervious solid material, such as plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, and in a second zone spatially distinct from the first zone unlabelled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilised on the carrier material and is therefore not mobile in the moist state, the two zones being arranged such that liquid sample applied to the porous carrier can permeate via the first zone into the second zone, and the device incorporating an aType: GrantFiled: July 15, 1993Date of Patent: April 22, 1997Assignee: Unilever Patent Holdings B.V.Inventors: Keith May, Michael E. Prior, Ian Richards
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Patent number: 5602040Abstract: An analytical test device useful for example in pregnancy testing, includes a hollow casing (500) constructed of moisture-impervious solid material, such as plastics materials, containing a dry porous carrier (510) which communicates indirectly with the exterior of the casing via a bibulous sample receiving member (506) which protrudes from the casing such that a liquid test sample can be applied to the receiving member and permeate therefrom to the porous carrier, the carrier containing in a first zone a labelled specific binding reagent is freely mobile within the porous carrier when in the moist state, wherein the mobility is facilitated by a material comprising sugar, in a amount effective to reduce interaction between the test strip and the labelled reagent, and in a second zone spatially distinct from the first zone unlabeled specific binding reagent for the same analyte which unlabelled reagent is permanently immobilized on the carrier material and is therefore not mobile in the moist state, the two zoType: GrantFiled: May 12, 1994Date of Patent: February 11, 1997Assignee: Unilever Patent Holdings B.V.Inventors: Keith May, Michael E. Prior, Ian Richards
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Patent number: 5535312Abstract: A printing system for producing prints, with each print including an image represented by image data, is provided. The printing system includes a memory for storing and buffering the image data of a selected print and an image output terminal, communicating with the memory, for printing the image of the selected print on a substrate. The printing system further includes marking software, operatively associated with the image output terminal, for determining a value for the maximum amount of memory to be used in printing selected ones of the prints, and a resource manager, communicating with the marking software and the memory, for managing the memory. In practice, the resource manager receives the value from the marking software and the substrate is fed to the image output terminal when the resource manager determines that the value corresponds with a selected amount of available memory space and that an additional predetermined condition is satisfied.Type: GrantFiled: January 28, 1993Date of Patent: July 9, 1996Assignee: Xerox CorporationInventors: Tim D. Hammer, Colleen R. Enzien, Juan C. Acebo, M. John Ludlow, Keith A. May
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Patent number: 5375202Abstract: In accordance with the present invention there is provided a method for scheduling transfers in a printing machine of the type having a scheduler communicating with both a first disk and a second disk, the first and second disks having a combined bandwidth. The method for scheduling comprises the following steps: First, a first transfer to be performed on a first location of the first disk during a first time interval and a second transfer to be performed on a second location of the first disk during a second time interval are both scheduled, with the scheduler, so that a first time gap interval exists between the first time interval and the second time interval.Type: GrantFiled: January 4, 1993Date of Patent: December 20, 1994Assignee: Xerox CorporationInventors: Keith A. May, Colleen R. Enzien, Randall J. Stegbauer, Christopher Comparetta, Anthony M. Federico, Ronald A. Ippolito, Ernest Legg, Kitty Sathi
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Patent number: 5275785Abstract: A chromatographic test device for detecting the presence of an analyte in a liquid sample and incorporating at least two liquid-conductive zones (3, 4) which form separate liquid flow paths which deliver separate liquid streams to a region (8) in the test device during the test procedure, wherein control of the relative liquid flows in the separate flow paths is achieved, at least in part, by ensuring that at least one of the liquid flow paths is enhanced or made and/or broken or restricted during the course of the test procedure. Preferably such control is achieved by incorporating a liquid-swellable material (11) which is arranged to swell by contact with liquid sample and/or reagent and thereby to make or break contact between two liquid-conductive zones.Type: GrantFiled: June 25, 1992Date of Patent: January 4, 1994Assignee: Unilever Patent Holdings B.V.Inventors: Keith May, Michael E. Prior