Granted Patent
Utility
US 4,415,721 · App. 06/232,929
Semi or fully continuous process for polyester of bisphenol and dicarboxylic acid by transesterification polymerization and product thereof
Inventors:
George M. Kosanovich, Gideon Salee
Patented Case
View Patent ↗
Granted: Nov 15, 1983
Filed: Feb 9, 1981
Inventors
George M. Kosanovich
Gideon Salee
Assignee (at issue)
Occidental Chemical Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.