Granted Patent
Utility
US 6,290,870 · App. 09/513,323
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: Sep 18, 2001
Filed: Feb 25, 2000
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.