IP Library Granted Patent US 3,945,926
Granted Patent Utility
US 3,945,926 · App. 05/293,943

Integral microporous high void volume polycarbonate membranes and a dry process for forming same

Inventor: Robert E. Kesting
Patented Case View Patent ↗
Granted: Mar 23, 1976 Filed: Oct 2, 1972
Inventor
Robert E. Kesting
Assignee (at issue)
Chemico Systems, 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 3,945,926
App. No.
05/293,943
Filed
1972-10-02
Granted
1976-03-23
Kind
A