Granted Patent
Utility
US 5,608,124 · App. 07/879,068
Process for continuous liquid phase reaction of hydrogen fluoride and 1,1,1-trichloroethane to provide 1,1-dichloro-1-fluoroethane and 1-chloro-1, 1-difluoroethane mixtures
Inventor:
John A. Wismer
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: May 1, 1992
Inventor
John A. Wismer
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.