Granted Patent
Utility
US 4,857,583 · App. 07/069,527
Process for the preparation of organopolysiloxane surfactants
Inventors:
Paul E. Austin, David D. Farris, James D. Reedy, Charles H. Blevins, II, Philbert E. Ramdatt
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Jul 2, 1987
Inventors
Paul E. Austin
David D. Farris
James D. Reedy
Charles H. Blevins, II
Philbert E. Ramdatt
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.