Granted Patent
Utility
US 5,719,256 · App. 08/730,362
Process for preparing polycondensation polymer compound
Inventors:
Shoji Tamai, Yukiko Mori, Kenichi Goto, Katsuji Watanabe, Osamu Kohgo, Kotaro Shimizu, Toshiyuki Kataoka, Takashi Kuroki, Wataru Yamashita, Hideki Mizuta, Teruyuki Nagata
Patented Case
View Patent ↗
Granted: Feb 17, 1998
Filed: Oct 15, 1996
Inventors
Shoji Tamai
Yukiko Mori
Kenichi Goto
Katsuji Watanabe
Osamu Kohgo
Kotaro Shimizu
Toshiyuki Kataoka
Takashi Kuroki
Wataru Yamashita
Hideki Mizuta
Teruyuki Nagata
Assignee (at issue)
Mitsu Toatsu Chemicals, Inc.
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.