IP Library › Granted Patent US 4,522,902
Granted Patent Utility
US 4,522,902 · App. 06/609,941

Polymeric battery separators

Inventors: Robert J. Minchak, William N. Schenk
Patented Case View Patent ↗
Granted: Jun 11, 1985 Filed: May 14, 1984
Inventors
Robert J. Minchak
William N. Schenk
Assignee (at issue)
B. F. Goodrich Company

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 4,522,902
App. No.
06/609,941
Filed
1984-05-14
Granted
1985-06-11
Kind
A