Granted Patent
Utility
US 5,243,006 · App. 07/689,940
Acrylic copolymer
Inventors:
Nobuo Nakabayashi, Kazuhiko Ishihara, Takashi Yamamoto, Toru Kinoshita
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: May 31, 1991
Inventors
Nobuo Nakabayashi
Kazuhiko Ishihara
Takashi Yamamoto
Toru Kinoshita
Assignees (at issue)
Nobuo Nakabayashi
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.