Granted Patent
Utility
US 5,739,255 · App. 08/682,159
Benzylic ether phenolic resole resins
Inventors:
Thomas E. Dando, William R. Dunnavant, Robert B. Fechter, Heimo J. Langer
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Jul 17, 1996
Inventors
Thomas E. Dando
William R. Dunnavant
Robert B. Fechter
Heimo J. Langer
Assignee (at issue)
Ashland, 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.