Granted Patent
Utility
US 4,806,504 · App. 06/906,344
Planarization method
Inventor:
James M. Cleeves
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Sep 11, 1986
Inventor
James M. Cleeves
Assignee (at issue)
FAIRCHILD SEMICONDUCTOR 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.