Granted Patent
Utility
US 4,271,200 · App. 06/063,997
Method of preparing a frozen pizza
Inventors:
Walter L. Hempenius, June E. Yantis
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: Aug 6, 1979
Inventors
Walter L. Hempenius
June E. Yantis
Assignee (at issue)
The Quaker Oats 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.