IP Library › Granted Patent US 4,431,744
Granted Patent Utility
US 4,431,744 · App. 06/384,319

Carbon bonded refractory brick

Inventors: Mark C. Kernion, David J. Michael
Patented Case View Patent ↗
Granted: Feb 14, 1984 Filed: Jun 2, 1982
Inventors
Mark C. Kernion
David J. Michael
Assignee (at issue)
Dresser Industries, 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 4,431,744
App. No.
06/384,319
Filed
1982-06-02
Granted
1984-02-14
Kind
A