Granted Patent
Utility
US 5,169,997 · App. 07/774,026
Stabilized 1,1-dichloro-1-fluoroethane
Inventors:
Richard M. Crooker, Maher Y. Elsheikh
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Oct 9, 1991
Inventors
Richard M. Crooker
Maher Y. Elsheikh
Assignee (at issue)
Elf Atochem North America, 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.