Granted Patent
Utility
US 5,264,044 · App. 07/878,135
Method of cleaning using hydrochlorofluorocarbons having a tertiary structure
Inventor:
Chien C. Li
Patented Case
View Patent ↗
Granted: Nov 23, 1993
Filed: May 4, 1992
Inventor
Chien C. Li
Assignee (at issue)
AlliedSignal, Inc.
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.