Granted Patent
Utility
US 5,157,092 · App. 07/535,535
Polymer of 4-methylpentene-1
Inventors:
Tadashi Asanuma, Tetsunosuke Shiomura, Nobutaka Uchikawa, Yukari Tamai, Tateyo Sasaki, Tutomu Iwatani
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Jun 11, 1990
Inventors
Tadashi Asanuma
Tetsunosuke Shiomura
Nobutaka Uchikawa
Yukari Tamai
Tateyo Sasaki
Tutomu Iwatani
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.