Granted Patent
Utility
US 4,889,693 · App. 07/146,954
Apparatus for venting of gases from contact lens cases
Inventors:
Kai C. Su, Jack C. White
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Jan 22, 1988
Inventors
Kai C. Su
Jack C. White
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.