Granted Patent
Utility
US 5,686,139 · App. 08/762,493
Preparation of free-flowing crumb rubber composition
Inventors:
Donald C. Grimm, Michael Kenneth Stockdale
Patented Case
View Patent ↗
Granted: Nov 11, 1997
Filed: Dec 9, 1996
Inventors
Donald C. Grimm
Michael Kenneth Stockdale
Assignee (at issue)
THE GOODYEAR 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.