Granted Patent
Utility
US 4,847,398 · App. 07/094,720
Process for the preparation of siloxane-oxyalkylene copolymers
Inventors:
Kunj R. Mehta, Richard A. Lehew, James D. Reedy, David D. Farris, Paul E. Austin
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Sep 9, 1987
Inventors
Kunj R. Mehta
Richard A. Lehew
James D. Reedy
David D. Farris
Paul E. Austin
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.