Granted Patent
Utility
US 4,910,106 · App. 07/228,883
Formation of halogenated polymeric microporous membranes having improved strength properties
Inventors:
Edward R. Kafchinski, Herman Leslie Lanieve, Gordon Calundann, Tai-Shung Chung
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Aug 5, 1988
Inventors
Edward R. Kafchinski
Herman Leslie Lanieve
Gordon Calundann
Tai-Shung Chung
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.