Granted Patent
Utility
US 6,326,409 · App. 09/694,264
In-mold foaming article of polypropylene resin composition
Inventors:
Tsuyoshi Mihayashi, Yutaka Yanagihara, Takayuki Goda
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Oct 24, 2000
Inventors
Tsuyoshi Mihayashi
Yutaka Yanagihara
Takayuki Goda
Assignee (at issue)
KANEKA 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.