Granted Patent
Utility
US 5,905,112 · App. 08/832,547
Tire tread of diene rubber, and naphthenic and/or paraffinic oil, or aromatic oil and mineral filler
Inventor:
Walter Hellermann
Patented Case
View Patent ↗
Granted: May 18, 1999
Filed: Apr 2, 1997
Inventor
Walter Hellermann
Assignee (at issue)
Huels Aktiengesellschaft
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.