Granted Patent
Utility
US 5,034,499 · App. 07/181,233
Acetal copolymers with backbone epoxide functional groups
Inventors:
Nan-Loh Yang, Andrew Auerbach, James L. Paul, Yong Zheng, Shian S. Wang
Patented Case
View Patent ↗
Granted: Jul 23, 1991
Filed: Apr 13, 1988
Inventors
Nan-Loh Yang
Andrew Auerbach
James L. Paul
Yong Zheng
Shian S. Wang
Assignee (at issue)
Hoechst Celanese 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.