IP Library › Granted Patent US 4,631,298
Granted Patent Utility
US 4,631,298 · App. 06/809,563

Mixed diamine chain extender

Inventor: J. Kenneth Presswood
Patented Case View Patent ↗
Granted: Dec 23, 1986 Filed: Dec 16, 1985
Inventor
J. Kenneth Presswood
Assignee (at issue)
Ethyl Corporation

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 4,631,298
App. No.
06/809,563
Filed
1985-12-16
Granted
1986-12-23
Kind
A