Granted Patent
Utility
US 4,393,261 · App. 06/421,632
Hydrocarbon resin and process for preparation
Inventor:
Robert Allen
Patented Case
View Patent ↗
Granted: Jul 12, 1983
Filed: Sep 22, 1982
Inventor
Robert Allen
Assignee (at issue)
EASTMAN KODAK COMPANY
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.