IP Library › Granted Patent US 4,483,946
Granted Patent Utility
US 4,483,946 · App. 06/460,263

Refractory, heat-insulating liner

Inventors: Andrew Barnes, Raymond W. Yates
Patented Case View Patent ↗
Granted: Nov 20, 1984 Filed: Jan 24, 1983
Inventors
Andrew Barnes
Raymond W. Yates

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 4,483,946
App. No.
06/460,263
Filed
1983-01-24
Granted
1984-11-20
Kind
A