Granted Patent
Utility
US 4,004,939 · App. 05/493,382
Bisulfite terminated oligomers as dispersing agents
Inventors:
John T. O'Brien, Woodrow W. White
Patented Case
View Patent ↗
Granted: Jan 25, 1977
Filed: Jul 31, 1974
Inventors
John T. O'Brien
Woodrow W. White
Assignee (at issue)
Uniroyal Ltd.
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.