Granted Patent
Utility
US 4,450,126 · App. 06/370,340
High strength nylon blend membranes
Inventor:
Robert E. Kesting
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Apr 21, 1982
Inventor
Robert E. Kesting
Assignee (at issue)
Puropore, 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.