IP Library › Granted Patent US 4,560,498
Granted Patent Utility
US 4,560,498 · App. 06/084,352

Positive temperature coefficient of resistance compositions

Inventors: David A. Horsma, Teddy J. Hammack
Patented Case View Patent ↗
Granted: Dec 24, 1985 Filed: Oct 12, 1979
Inventors
David A. Horsma
Teddy J. Hammack
Assignee (at issue)
Raychem Limited

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 4,560,498
App. No.
06/084,352
Filed
1979-10-12
Granted
1985-12-24
Kind
A