Granted Patent
Utility
US 5,316,591 · App. 07/927,443
Cleaning by cavitation in liquefied gas
Inventors:
Sidney C. Chao, Edna M. Purer, Thomas B. Stanford, Carl W. Townsend
Patented Case
View Patent ↗
Granted: May 31, 1994
Filed: Aug 10, 1992
Inventors
Sidney C. Chao
Edna M. Purer
Thomas B. Stanford
Carl W. Townsend
Assignee (at issue)
Hughes Aircraft 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.