Granted Patent
Utility
US 6,676,847 · App. 09/851,368
Monocarboxylic acid based antifreeze composition for diesel engines
Inventors:
David E. Turcotte, Michael A. Dituro, Arnold L. Coffey, Jr., Alden W. Olsen, Carl R. Stephens
Patented Case
View Patent ↗
Granted: Jan 13, 2004
Filed: May 8, 2001
Inventors
David E. Turcotte
Michael A. Dituro
Arnold L. Coffey, Jr.
Alden W. Olsen
Carl R. Stephens
Assignee (at issue)
Ashland, Inc.
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.