Granted Patent
Utility
US 6,221,995 · App. 09/300,842
Modified polyisocyanate and production process thereof
Inventors:
Tominaga Yukio, Tsuchida Atsuko, Shiraki Hiroyuki
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Apr 28, 1999
Inventors
Tominaga Yukio
Tsuchida Atsuko
Shiraki Hiroyuki
Assignee (at issue)
Takeda Chemical 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.