Granted Patent
Utility
US 5,266,641 · App. 08/013,175
Butene-1 copolymers and resin compositions containing the same
Inventors:
Tadashi Asanuma, Tetsunosuke Shiomura, Tateyo Sasaki, Tutomu Iwatani, Nobutaka Uchikawa, Kouji Kitabayashi
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Jan 29, 1993
Inventors
Tadashi Asanuma
Tetsunosuke Shiomura
Tateyo Sasaki
Tutomu Iwatani
Nobutaka Uchikawa
Kouji Kitabayashi
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.