Patents by Inventor David Albert Martin

David Albert Martin 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).

  • Crosslinked polyaspartate salts a process for their production
    Patent number: 5981761
    Abstract: A first embodiment comprises reacting PSI with polyhydrazide selected from the group consisting of dihydrazides and trihydrazides and mixtures thereof, subsequently hydrolyzing the crosslinked PSI with base to produce crosslinked polyaspartate. A second embodiment comprises reacting PSI with hydrazine to form an intermediate product which is reacted with polyacyl chloride or polyester to produce crosslinked PSI followed by hydrolysis to form crosslinked salt. Isolation of the intermediate before reaction with the polyacyl chloride or polyester is unnecessary.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: November 9, 1999
    Assignee: Solutia Inc.
    Inventors: Yueting Chou, Dennis J. Kalota, David Albert Martin