Granted Patent
Utility
US 6,281,309 · App. 09/003,594
Flourinated solid acids as catalysts for the preparation of hydrocarbon resins
Inventors:
Laura M. Babcock, Dennis G. Morrell, John N. Kostas, Andrew Bell
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Jan 7, 1998
Inventors
Laura M. Babcock
Dennis G. Morrell
John N. Kostas
Andrew Bell
Assignee (at issue)
Eastman Chemical 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.