Granted Patent
Utility
US 5,240,630 · App. 07/958,628
Refrigeration compositions containing diester-amides of dialkanolamines
Inventors:
Mahmood Sabahi, Donald R. Bell
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: Oct 9, 1992
Inventors
Mahmood Sabahi
Donald R. Bell
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.