Granted Patent
Utility
US 4,485,211 · App. 06/418,341
Poly(glycidyl ether)block copolymers and process for their preparation
Inventor:
Yoshihisa Okamoto
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Sep 15, 1982
Inventor
Yoshihisa Okamoto
Assignee (at issue)
B. F. Goodrich Company
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.