Granted Patent
Utility
US 4,053,339 · App. 05/584,175
Method of making composite paper hardboard panel
Inventors:
Charles F. Story, Donald B. Gibson
Patented Case
View Patent ↗
Granted: Oct 11, 1977
Filed: Jun 5, 1975
Inventors
Charles F. Story
Donald B. Gibson
Assignee (at issue)
Champion International Corporation Limited
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.