Granted Patent
Utility
US 5,338,802 · App. 07/904,152
Low temperature conversion of polymerized esters
Inventors:
Donn A. DuBois, Robert J. Sutherland
Patented Case
View Patent ↗
Granted: Aug 16, 1994
Filed: Dec 21, 1992
Inventors
Donn A. DuBois
Robert J. Sutherland
Assignee (at issue)
SHELL OIL 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.