Granted Patent
Utility
US 5,698,634 · App. 08/683,208
Process for preparing block copolymer of monoolefin
Inventors:
Hajime Yasuda, Eiji Ihara
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Jul 18, 1996
Inventors
Hajime Yasuda
Eiji Ihara
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.