Granted Patent
Utility
US 4,298,666 · App. 06/125,195
Coated open-celled microporous membranes
Inventor:
Henry T. Taskier
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Feb 27, 1980
Inventor
Henry T. Taskier
Assignee (at issue)
Celanese GmbH
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.