Granted Patent
Utility
US 5,000,866 · App. 07/499,132
Antifreeze compositions containing alkane tetracarboxylic acid for use with hard water
Inventor:
Peter M. Woyciesjes
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Mar 26, 1990
Inventor
Peter M. Woyciesjes
Assignee (at issue)
First Brands Corporation
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.