Granted Patent
Utility
US 6,596,677 · App. 09/668,961
Propylene carbonate based cleaning compositions
Inventors:
James R. Machac, Jr., Susan A. Woodrum, Howard P. Klein, Edward T. Marquis
Patented Case
View Patent ↗
Granted: Jul 22, 2003
Filed: Sep 25, 2000
Inventors
James R. Machac, Jr.
Susan A. Woodrum
Howard P. Klein
Edward T. Marquis
Assignee (at issue)
HUNTSMAN PETROCHEMICAL 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.