Patents by Inventor Roger A. Latham

Roger A. Latham 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).

  • Iodothyronine polymers
    Patent number: 5910569
    Abstract: Iodothyronine polymers having a plurality of recurring units of formula I ##STR1## in which A is iodo and B, C and D are independently H or iodo are described. Polymers in which A and C are iodo and B and D are independently H or iodo and in which substantially all of the recurring units are L-stereoisomers, have utility in treating thyroid hormone deficiencies.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: June 8, 1999
    Assignee: Lotus Biochemical Corporation
    Inventors: Keith Roger Latham, Vincent Ernest Latham
  • Iodothyronine polymers
    Patent number: 5767227
    Abstract: Iodothyronine polymers having a plurality of recurring units of formula I ##STR1## in which A is iodo and B, C and D are independently H or iodo are described. Polymers in which A and C are iodo and B and D are independently H or iodo and in which substantially all of the recurring units are L-stereoisomers, have utility in treating thyroid hormone deficiencies.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: June 16, 1998
    Assignee: Lotus Biochemical Corp.
    Inventors: Keith Roger Latham, Vincent Ernest Latham
  • Low pour crude oil compositions
    Patent number: 4926582
    Abstract: A low pour point crude oil composition is prepared by incorporating in a waxy crude oil an effective pour point depressant amount of an oil soluble ethylene-acryonitrile copolymer or terpolymer. The copolymer or terpolymer is usually added as a solution. In one aspect the invention relates to the pipeline transportation of the low pour crude oil composition.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: May 22, 1990
    Assignee: E. I. duPont de Nemours & Company
    Inventors: Kaye L. Motz, Roger A. Latham, Robert J. Statz
  • High impact resistant polyamide
    Patent number: 4536541
    Abstract: High impact resistant polyamide resins containing an amorphous polyamide and dispersed particles of a toughener containing grafted succinic anhydride groups. The toughener has a particle size of less than about 360 nm, as determined by a small angle X-ray scattering technique. The toughener is present in the resin in the amount of at least 15% by weight.
    Type: Grant
    Filed: February 27, 1984
    Date of Patent: August 20, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Roger A. Latham