Granted Patent
Utility
US 4,493,960 · App. 06/407,377
Ceramic blinders for a microwave oven quartz lamp
Inventors:
Robert A. Mittelsteadt, Gregory W. Machesney
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Aug 12, 1982
Inventors
Robert A. Mittelsteadt
Gregory W. Machesney
Assignee (at issue)
Micro-Quartz Technology Corp.
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.