Granted Patent
Utility
US 4,449,633 · App. 06/104,626
Ovenable paperboard carton
Inventors:
Harold D. Johnson, Earle C. Sherman, Leonard M. Cooper
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Dec 17, 1979
Inventors
Harold D. Johnson
Earle C. Sherman
Leonard M. Cooper
Assignee (at issue)
Manville Service 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.