Granted Patent
Utility
US 4,904,711 · App. 07/255,241
Polymer concrete composition for cementitious road repair and overlay
Inventors:
Kathy B. Sellstrom, Harold G. Waddill
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Oct 11, 1988
Inventors
Kathy B. Sellstrom
Harold G. Waddill
Assignee (at issue)
Texaco Inc.
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.