Patents by Inventor Theodore Roseuelt Walker

Theodore Roseuelt Walker 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).

  • Process for preparing poly (2,2,4,4-tetramethyl-1,3-cyclobutylene carbonate)
    Patent number: 6255437
    Abstract: This invention relates to a polycarbonate represented by the formula (I): wherein R1 is H, alkyl, aryl, R2 is alkyl, aryl, or alkoxy, R3 and R4 are alkyl or aryl having 1 to 20 carbons, and n is from 100 to 100,000.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: July 3, 2001
    Assignee: Eastman Chemical Company
    Inventors: Theodore Roseuelt Walker, William Ronald Darnell, Jean Carroll Fleischer