Granted Patent
Utility
US 4,970,033 · App. 07/390,133
Process for casting tire tread impressions using a photopolymerizable composition as the casting material
Inventors:
Joseph DeGiovanni, Richard B. Schroeder
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Aug 7, 1989
Inventors
Joseph DeGiovanni
Richard B. Schroeder
Assignee (at issue)
HERCULES LLC
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.