Granted Patent
Utility
US 3,992,154 · App. 05/643,189
Ethylene oxide sterilization indicator
Inventors:
James E. Whitbourne, Carolyn A. Eastman
Patented Case
View Patent ↗
Granted: Nov 16, 1976
Filed: Dec 22, 1975
Inventors
James E. Whitbourne
Carolyn A. Eastman
Assignee (at issue)
Sybron 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.