Granted Patent
Utility
US 4,885,344 · App. 07/145,238
Polymeric materials and their use as resists
Inventors:
Stanley Affrossman, Massoud Bakhshaee, Richard A. Pethrick, David C. Sherrington
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Jan 19, 1988
Inventors
Stanley Affrossman
Massoud Bakhshaee
Richard A. Pethrick
David C. Sherrington
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.