Granted Patent
Utility
US 6,627,668 · App. 09/916,315
Process for preparing polyolefin pre-expanded particles
Inventors:
Shinobu Ochikoshi, Yutaka Yanagihara, Naruhiko Akamatsu
Patented Case
View Patent ↗
Granted: Sep 30, 2003
Filed: Jul 30, 2001
Inventors
Shinobu Ochikoshi
Yutaka Yanagihara
Naruhiko Akamatsu
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.