Granted Patent
Utility
US 5,395,915 · App. 08/104,920
Method for simultaneous preparation of bisphenol F and novolak phenol resins
Inventors:
Shigeru Iimuro, Satoru Ito, Tomoko Takashima, Takashi Kitamura
Patented Case
View Patent ↗
Granted: Mar 7, 1995
Filed: Aug 12, 1993
Inventors
Shigeru Iimuro
Satoru Ito
Tomoko Takashima
Takashi Kitamura
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.