Patents by Inventor Kenneth J. Pierre

Kenneth J. Pierre 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).

  • Kinetic assay for acid phosphotase and composition therefore
    Patent number: 4162194
    Abstract: A kinetic assay is provided for determining the acid phosphatase in an aqueous solution by measuring the amount of of reduced coenzyme produced. The assay is based on the following coupled reactions:I. organic phosphate .sup.acid phosphatase PO.sub.4.sup.-3 +organic alcoholII. maltose+PO.sub.4.sup.-3 maltose phosphorylase glucose+ .beta.-D-glucose-1-phosphate;III. .beta.-D-glucose-1-phosphate .beta.-D-phosphoglucomutase glucose-6-phosphate;IV. glucose-6-phosphate+NAD glucose-6-phosphate dehydrogenase NADH+6-phosphogluconate.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: July 24, 1979
    Assignee: Beckman Instruments, Inc.
    Inventors: Kenneth J. Pierre, Ker-Kong Tung, Henriette Nadj
  • Kinetic assay for inorganic phosphates and composition therefore
    Patent number: 4159923
    Abstract: A kinetic assay is provided for determining the inorganic phosphate content in an aqueous solution by measuring the amount of reduced coenzyme produced. The assay is based on the following coupled reactions:I. maltose+PO.sub.4.sup.-3 maltose phosphorylase glucose+.beta.-D-glucose-1-phosphate;Ii. .beta.-d-glucose-1-phosphate .beta.-D-phosphoglucomutase glucose-6-phosphate;Iii. glucose-6-phosphate+NAD glucose-6-phosphate dehydrogenase NADH+6-phosphogluconate.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: July 3, 1979
    Assignee: Beckman Instruments, Inc.
    Inventors: Kenneth J. Pierre, Ker-Kong Tung, Henriette Nadj
  • Kinetic method for determination of glucose concentrations with glucose dehydrogenase
    Patent number: 4120755
    Abstract: The range of linearity of the kinetic method for the determination of glucose concentrations using a reagent of the type comprising a buffer, a pyridine coenzyme, and glucose dehydrogenase, is significantly increased when the buffer employed in the reagent has a pH of from about 7.9 to about 9.0.
    Type: Grant
    Filed: April 28, 1977
    Date of Patent: October 17, 1978
    Assignee: Beckman Instruments, Inc.
    Inventors: Kenneth J. Pierre, Ker-Kong Tung
  • Reagent system for beta-amylase assay
    Patent number: 4097336
    Abstract: A reagent system for beta-amylase assay comprising:A polysaccharide having glucose molecules primarily connected through alpha 1,4 linkagesPhosphate ionsMaltose phosphorylaseA co-enzyme selected from a group consisting of beta-nicotinamide-adenine dinucleotide, beta-nicotinamide-adenine dinucleotide phosphate, and mixture thereofGlucose-6-phosphate dehydrogenaseBeta-D-phosphoglucomutaseMutarotase.
    Type: Grant
    Filed: January 11, 1977
    Date of Patent: June 27, 1978
    Assignee: Beckman Instruments, Inc.
    Inventors: Kenneth J. Pierre, Ker-Kong Tung, Henriette Nadj