Granted Patent
Utility
US 6,511,546 · App. 09/449,305
Aqueous cleaning
Inventors:
Elizabeth A. Bivins, Nelson E. Prieto, Michael E. Hayes, Byron A. Starkweather
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Nov 24, 1999
Inventors
Elizabeth A. Bivins
Nelson E. Prieto
Michael E. Hayes
Byron A. Starkweather
Assignee (at issue)
Petroferm, 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.