The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2001
Filed:
May. 07, 1996
Takami Kakuda, Haibara-gun, JP;
Ayumu Nozawa, Haibara-gun, JP;
Takanobu Takihara, Haibara-gun, JP;
Iwao Sakane, Haibara-gun, JP;
Yoichiro Kuroda, Musashino, JP;
Kazuo Kobayashi, Tokyo, JP;
Masahiro Kawahara, Kokubunji, JP;
Akihiro Mizutani, Tachikawa, JP;
Kazuyo Muramoto, Kokubunji, JP;
Kunihiko Umezawa, Kesennuma, JP;
Ito En, Ltd., Tokyo, JP;
Abstract
This invention is characterized by a brain function improving preparation containing theanine not less than 50 &mgr;M. It was confirmed that theanine could increase intracellular Ca,concentration by acting on NMDA receptors even at a low dose of about 50 &mgr;M. Thus, the brain function improving preparation of this invention was shown to be capable of causing plastic change in neurons or neural circuit. Since theanine has been approved as a food additive and being consumed daily, its safety has no problem. Moreover, theanine passes the blood-brain barrier relatively easily and, thus, it is effective as an oral preparation.