Granted Patent
Utility
US 6,800,433 · App. 09/959,274
Process for purification of proanthocyanidin oligomer
Inventors:
Shinkichi Honda, Tomoya Takahashi, Ayako Kamimura, Takako Matsuoka, Tomomasa Kanda, Akio Yanagida, Kazuo Hieda
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Oct 19, 2001
Inventors
Shinkichi Honda
Tomoya Takahashi
Ayako Kamimura
Takako Matsuoka
Tomomasa Kanda
Akio Yanagida
Kazuo Hieda
Assignees (at issue)
KYOWA HAKKO KOGYO CO., LTD.
THE NIKKA WHISKY DISTILLING CO., LTD.
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.