Granted Patent
Utility
US 4,304,732 · App. 06/107,016
Alkylene oxide-sulfur dioxide copolymer surface active agents
Inventor:
James H. McCain
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Dec 26, 1979
Inventor
James H. McCain
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.