Granted Patent
Utility
US 6,323,286 · App. 09/529,547
Polypropylene composition
Inventors:
Hitoshi Kuramochi, Osamu Kojima, Yoshitaka Sumi, Takanori Nakashima, Shinichi Akitaya
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Apr 14, 2000
Inventors
Hitoshi Kuramochi
Osamu Kojima
Yoshitaka Sumi
Takanori Nakashima
Shinichi Akitaya
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.