Granted Patent
Utility
US 5,238,554 · App. 07/902,194
Method of making patterns
Inventor:
Christopher P. Banks
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Jun 22, 1992
Inventor
Christopher P. Banks
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.