Granted Patent
Utility
US 4,789,721 · App. 07/078,310
Curatives of epoxy resins from dicarboxylic acids, including (1) indane or (2) tert-butylisophtalic derived acids, reacted with polyetherdiamines
Inventors:
Harold G. Waddill, Jiang-Jen Lin, George P. Speranza
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Jul 27, 1987
Inventors
Harold G. Waddill
Jiang-Jen Lin
George P. Speranza
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.