Granted Patent
Utility
US 4,906,694 · App. 07/201,254
Thermoplastic elastomer composition and process for preparation thereof
Inventors:
Katsuyoshi Yonekura, Akira Uchiyama, Akira Matsuda
Patented Case
View Patent ↗
Granted: Mar 6, 1990
Filed: May 9, 1988
Inventors
Katsuyoshi Yonekura
Akira Uchiyama
Akira Matsuda
Assignee (at issue)
Mitsui Petrochemical 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.