Granted Patent
Utility
US 5,043,113 · App. 07/558,992
Process for formation of halogenated polymeric microporous membranes having improved strength properties
Inventors:
Edward R. Kafchinski, Tai-Shung Chung, Hubert Bader, James J. Lowery
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Jul 27, 1990
Inventors
Edward R. Kafchinski
Tai-Shung Chung
Hubert Bader
James J. Lowery
Assignee (at issue)
Hoechst Celanese 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.