Granted Patent
Utility
US 4,459,936 · App. 06/373,650
Apparatus for indicating whether the interior of a container has been sterilized during a sterilization process
Inventor:
David A. Karle
Patented Case
View Patent ↗
Granted: Jul 17, 1984
Filed: Apr 30, 1982
Inventor
David A. Karle
Assignee (at issue)
American Sterilizer Company
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.