Granted Patent
Utility
US 5,073,478 · App. 07/439,724
Method of making a pattern
Inventors:
Christopher P. Banks, Edward Irving
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Nov 20, 1989
Inventors
Christopher P. Banks
Edward Irving
Assignee (at issue)
Ciba-Geigy
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.