Granted Patent
Utility
US 5,730,779 · App. 08/741,843
Fluorochemical recovery and recycle using membranes
Inventors:
Iosif Chernyakov, Thomas Hsiao-Ling Hsiung, Alexander Schwarz, James H. C. Yang
Patented Case
View Patent ↗
Granted: Mar 24, 1998
Filed: Oct 31, 1996
Inventors
Iosif Chernyakov
Thomas Hsiao-Ling Hsiung
Alexander Schwarz
James H. C. Yang
Assignee (at issue)
Air Products and 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.