IP Library › Granted Patent US 5,042,213
Granted Patent Utility
US 5,042,213 · App. 07/126,531

Channel utility notch

Inventors: Robert J. Menchetti, Robert M. Chapman
Patented Case View Patent ↗
Granted: Aug 27, 1991 Filed: Nov 30, 1987
Inventors
Robert J. Menchetti
Robert M. Chapman
Assignee (at issue)
National Gypsum Company

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 5,042,213
App. No.
07/126,531
Filed
1987-11-30
Granted
1991-08-27
Kind
A