Granted Patent
Utility
US 4,987,192 · App. 07/353,945
Colored tire stocks having improved abrasion resistance, color and color stability
Inventors:
Arthur E. Oberster, Charles M. Roland, Georg G. A. Bohm
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: May 19, 1989
Inventors
Arthur E. Oberster
Charles M. Roland
Georg G. A. Bohm
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.