Granted Patent
Utility
US 4,319,051 · App. 06/185,852
Trisphenol hydrate
Inventors:
Koreyoshi Suenobu, Eizaburo Kaku, Takanori Miura
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: Sep 10, 1980
Inventors
Koreyoshi Suenobu
Eizaburo Kaku
Takanori Miura
Assignee (at issue)
Yoshitomi Pharmaceutical Industries, Ltd.
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.