Granted Patent
Utility
US 4,337,330 · App. 06/183,068
Blends of water soluble polyethers and poly(hydroxyethers)s
Inventor:
Lloyd M. Robeson
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Sep 2, 1980
Inventor
Lloyd M. Robeson
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.