Granted Patent
Utility
US 6,469,122 · App. 09/623,220
Polyisocyanate and process for producing the same
Inventors:
Yoshiyuki Asahina, Jun-ichi Kanemaru
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Aug 30, 2000
Inventors
Yoshiyuki Asahina
Jun-ichi Kanemaru
Assignee (at issue)
ASAHI KASEI KABUSHIKI KAISHA
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.