Granted Patent
Utility
US 4,288,498 · App. 06/147,462
Method of making leather fiber insulation by drying-case hardening and product thereof
Inventor:
Herbert C. Scribner
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: May 6, 1980
Inventor
Herbert C. Scribner
Assignee (at issue)
COLLAGEN 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.