Granted Patent
Utility
US 5,467,492 · App. 08/236,776
Dry-cleaning of garments using liquid carbon dioxide under agitation as cleaning medium
Inventors:
Sidney C. Chao, Thomas B. Stanford, Edna M. Purer, Angela Y. Wilkerson
Patented Case
View Patent ↗
Granted: Nov 21, 1995
Filed: Apr 29, 1994
Inventors
Sidney C. Chao
Thomas B. Stanford
Edna M. Purer
Angela Y. Wilkerson
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.