Granted Patent
Utility
US 5,240,629 · App. 07/819,073
Refrigerant compositions
Inventor:
Joel F. Carpenter
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Jan 10, 1992
Inventor
Joel F. Carpenter
Assignee (at issue)
Ethyl Corporation
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.