Granted Patent
Utility
US 4,260,396 · App. 05/869,402
Compositions for polishing silicon and germanium
Inventor:
Rimantas Glemza
Patented Case
View Patent ↗
Granted: Apr 7, 1981
Filed: Jan 16, 1978
Inventor
Rimantas Glemza
Assignee (at issue)
W. R. Grace & Co.
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.