IP Library Granted Patent US 4,146,681
Granted Patent Utility
US 4,146,681 · App. 05/864,083

Seal closure for a galvanic cell

Inventor: Frank G. Spanur
Patented Case View Patent ↗
Granted: Mar 27, 1979 Filed: Dec 23, 1977
Inventor
Frank G. Spanur
Assignee (at issue)
Union Carbide 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.

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 4,146,681
App. No.
05/864,083
Filed
1977-12-23
Granted
1979-03-27
Kind
A