Granted Patent
Utility
US 4,323,425 · App. 06/132,505
Paper sizing
Inventors:
Edwin Dowthwaite, Ian R. Hiskens
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Mar 21, 1980
Inventors
Edwin Dowthwaite
Ian R. Hiskens
Assignee (at issue)
Tenneco Chemicals, 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.