Granted Patent
Utility
US 4,387,121 · App. 06/300,840
Method of manufacture of a water-permeable-hydrophobic membrane
Inventors:
Philip A. Cautilli, Edward Wotier
Patented Case
View Patent ↗
Granted: Jun 7, 1983
Filed: Sep 10, 1981
Inventors
Philip A. Cautilli
Edward Wotier
Assignee (at issue)
GAF 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.