Granted Patent
Utility
US 6,593,383 · App. 10/157,434
Process for preparing polyolefin pre-expanded particles
Inventors:
Yutaka Yanagihara, Masahide Ebisui, Naruhiko Akamatsu
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: May 29, 2002
Inventors
Yutaka Yanagihara
Masahide Ebisui
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.