Granted Patent
Utility
US 5,219,930 · App. 07/006,568
Process for converting vinyl alcohol polymers to poly(keto-esters) therefrom
Inventors:
Biau-Hung Chang, Jack Kwiatek, Thomas S. Brima
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Jan 21, 1993
Inventors
Biau-Hung Chang
Jack Kwiatek
Thomas S. Brima
Assignee (at issue)
Quantum 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.