Granted Patent
Utility
US 6,337,378 · App. 09/637,936
Process for producing polyvinyl chloride paste blending resin
Inventors:
Teiji Kobayashi, Taizou Yamamoto, Masahiro Kubo, Taizou Koike
Patented Case
View Patent ↗
Granted: Jan 8, 2002
Filed: Aug 14, 2000
Inventors
Teiji Kobayashi
Taizou Yamamoto
Masahiro Kubo
Taizou Koike
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.