Granted Patent
Utility
US 6,271,310 · App. 09/402,998
Polypropylene composition and process for producing the same
Inventors:
Chikashi Okayama, Takanori Nakashima, Akira Yamauchi, Jun Saito, Michitaka Sasaki
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Oct 15, 1999
Inventors
Chikashi Okayama
Takanori Nakashima
Akira Yamauchi
Jun Saito
Michitaka Sasaki
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.