Granted Patent
Utility
US 4,430,491 · App. 06/429,748
Poly(ether-amide) polymeric compositions
Inventors:
Billy M. Culbertson, Timothy A. Tufts
Patented Case
View Patent ↗
Granted: Feb 7, 1984
Filed: Sep 30, 1982
Inventors
Billy M. Culbertson
Timothy A. Tufts
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.