Granted Patent
Utility
US 6,156,856 · App. 09/142,033
Propylene-ethylene copolymers processes for the production thereof and molded articles made therefrom
Inventors:
Jun Saito, Naoshi Kawamoto, Akiko Kageyama, Kouichi Hatada, Yoshiyuki Oogi
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: Sep 1, 1998
Inventors
Jun Saito
Naoshi Kawamoto
Akiko Kageyama
Kouichi Hatada
Yoshiyuki Oogi
Assignee (at issue)
Chisso Corporation
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.