Granted Patent
Utility
US 3,945,560 · App. 05/542,153
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Inventors:
Glen R. Harrelson, Earle C. Sherman
Patented Case
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Granted: Mar 23, 1976
Filed: Jan 20, 1975
Inventors
Glen R. Harrelson
Earle C. Sherman
Assignee (at issue)
Olinkraft, 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.