Granted Patent
Utility
US 6,605,193 · App. 09/841,909
Recovery of HFC-32
Inventor:
John A. Wismer
Patented Case
View Patent ↗
Granted: Aug 12, 2003
Filed: Apr 25, 2001
Inventor
John A. Wismer
Assignee (at issue)
ATOFINA Chemicals, 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.