Granted Patent
Utility
US 4,845,172 · App. 07/186,753
Co-advanced resins from copolymers of polyethers of polyhydric phenols and diglycidyl ethers of di-secondary alcohols
Inventors:
Vincent Brytus, Kenneth L. Payne
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Apr 26, 1988
Inventors
Vincent Brytus
Kenneth L. Payne
Assignee (at issue)
Ciba-Geigy
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.