Granted Patent
Utility
US 4,752,628 · App. 07/050,840
Concentrated lapping slurries
Inventor:
Charles C. Payne
Patented Case
View Patent ↗
Granted: Jun 21, 1988
Filed: May 15, 1987
Inventor
Charles C. Payne
Assignee (at issue)
Nalco Chemical Company
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.