Granted Patent
Utility
US 4,640,969 · App. 06/763,107
Oxazoline/polyol/polyisocyanate polymers and process
Inventors:
Anil B. Goel, Timothy A. Tufts, Peggy A. Blackburn
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Aug 7, 1985
Inventors
Anil B. Goel
Timothy A. Tufts
Peggy A. Blackburn
Assignee (at issue)
Ashland Oil, 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.