Granted Patent
Utility
US 5,037,673 · App. 07/586,192
Method of spin coating a solution of partially fluorinated polyamic acid polymer and cycloaliphatic ketone solvent
Inventors:
Allan A. Eisenbraun, Wesley C. Blocker
Patented Case
View Patent ↗
Granted: Aug 6, 1991
Filed: Sep 21, 1990
Inventors
Allan A. Eisenbraun
Wesley C. Blocker
Assignee (at issue)
Ethyl 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.