Patents by Inventor M. James Barrett

M. James Barrett 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).

  • Covalently bound biological substances to plastic materials and use in radioassay
    Patent number: 4225784
    Abstract: Covalently bound biological substances to plastic materials whose inside surfaces have been coated with glutaraldehyde, with or without prior treatment with an aliphatic amine or diamine, useful in radioimmunoassay procedures.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: September 30, 1980
    Assignee: Smith Kline Instruments, Inc.
    Inventor: M. James Barrett
  • Folic acid derivatives and use in radio-assay
    Patent number: 4091087
    Abstract: Novel folic acid derivatives useful for radioassaying folic acid and its metabolites in biological liquids are prepared from pteroyl-.gamma.-glutamyl-tyrosines by iodination with I.sup.125 or I.sup.131.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: May 23, 1978
    Assignee: Smith Kline Instruments, Inc.
    Inventors: M. James Barrett, Joseph I. De Graw
  • Covalently bound biological substances to plastic materials and use in radioassay
    Patent number: 4001583
    Abstract: Covalently bound biological substances to plastic materials whose inside surfaces have been coated with glutaraldehyde, with or without prior treatment with an aliphatic amine or diamine, useful in radioimmunoassay procedures.
    Type: Grant
    Filed: October 4, 1974
    Date of Patent: January 4, 1977
    Inventor: M. James Barrett
  • Folic acid derivatives and use in radio-assay
    Patent number: 3989812
    Abstract: Novel folic acid derivatives useful for radio-assaying folic acid and its metabolites in biological liquids are prepared from pteroyl-.gamma.-glutamyl-tyrosines by iodination with I.sup.125 or I.sup.131.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: November 2, 1976
    Assignee: SmithKline Instruments, Inc.
    Inventors: M. James Barrett, Joseph I. De Graw