Granted Patent
Utility
US 6,204,227 · App. 09/256,063
Metal working lubricant composition
Inventors:
Arvind M. Rao, Douglas G. Placek
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Feb 24, 1999
Inventors
Arvind M. Rao
Douglas G. Placek
Assignee (at issue)
PABU Services, 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.