Granted Patent
Utility
US 4,474,831 · App. 06/412,455
Method for reflow of phosphosilicate glass
Inventor:
Daniel F. Downey
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Aug 27, 1982
Inventor
Daniel F. Downey
Assignee (at issue)
Varian, 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.