IP Library › Granted Patent US 4,078,100
Granted Patent Utility
US 4,078,100 · App. 05/518,652

Composite foam laminate and method

Inventor: Ralph G. Doerfling
Patented Case View Patent ↗
Granted: Mar 7, 1978 Filed: Oct 29, 1974
Inventor
Ralph G. Doerfling
Assignee (at issue)
Detroit Gasket

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 4,078,100
App. No.
05/518,652
Filed
1974-10-29
Granted
1978-03-07
Kind
A