Granted Patent
Utility
US 4,352,439 · App. 06/253,254
Apparatus for closing the door of a pressure chamber
Inventor:
Raju T. Makhijani
Patented Case
View Patent ↗
Granted: Oct 5, 1982
Filed: Apr 13, 1981
Inventor
Raju T. Makhijani
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.