Granted Patent
Utility
US 4,239,879 · App. 06/051,788
Thermoplastic polyurethane prepared from a poly-1,2-propylene ether glycol, a low molecular weight glycol and 2,4-tolylene diisocyanate
Inventors:
Hubert J. Fabris, Robert J. Herold, Arden E. Schmucker
Patented Case
View Patent ↗
Granted: Dec 16, 1980
Filed: Jun 25, 1979
Inventors
Hubert J. Fabris
Robert J. Herold
Arden E. Schmucker
Assignee (at issue)
The General Tire & Rubber Company
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.