Granted Patent
Utility
US 5,563,219 · App. 08/267,747
Process for Preparing block copolymer of monoolefin
Inventors:
Hajime Yasuda, Eiji Ihara
Patented Case
View Patent ↗
Granted: Oct 8, 1996
Filed: Jul 5, 1994
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.