Granted Patent
Utility
US 6,133,386 · App. 09/003,888
Metal oxide solid acids as catalysts for the preparation of hydrocarbon resins
Inventors:
Dennis G. Morrell, Laura M. Babcock
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Jan 7, 1998
Inventors
Dennis G. Morrell
Laura M. Babcock
Assignee (at issue)
HERCULES LLC
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.