IP Library Granted Patent US 3,980,688
Granted Patent Utility
US 3,980,688 · App. 05/507,998

Polysiloxane-polyoxyalkylene block copolymers

Inventors: Carl J. Litteral, David L. Mullins
Patented Case View Patent ↗
Granted: Sep 14, 1976 Filed: Sep 20, 1974
Inventors
Carl J. Litteral
David L. Mullins
Assignee (at issue)
Union Carbide 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 3,980,688
App. No.
05/507,998
Filed
1974-09-20
Granted
1976-09-14
Kind
A