Granted Patent
Utility
US 4,224,204 · App. 06/021,290
Use of hydrocarbon polymers to improve oil-containing waxes
Inventors:
James W. Nichols, Rodney G. Lawrence, Lyle D. McClure
Patented Case
View Patent ↗
Granted: Sep 23, 1980
Filed: Mar 16, 1979
Inventors
James W. Nichols
Rodney G. Lawrence
Lyle D. McClure
Assignee (at issue)
Petrolite 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.