Granted Patent
Utility
US 4,276,396 · App. 06/143,243
Hydrocarbon resin and process for its preparation
Inventor:
Donald E. Gwynn
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Apr 24, 1980
Inventor
Donald E. Gwynn
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.