Granted Patent
Utility
US 4,720,445 · App. 06/829,874
Copolymers from maleimide and aliphatic vinyl ethers and esters used in positive photoresist
Inventors:
Karime Brahim, Michael J. McFarland
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Feb 18, 1986
Inventors
Karime Brahim
Michael J. McFarland
Assignee (at issue)
ALLIED CONSULTING, INC.
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.