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:
Mar. 18, 2008
Filed:
Apr. 03, 2003
Applicants:
Taketo Hayashi, Osaka, JP;
Takehiko Kawakami, Osaka, JP;
Yoshihiko Iwanaga, Osaka, JP;
Yosuke Watanabe, Osaka, JP;
Inventors:
Taketo Hayashi, Osaka, JP;
Takehiko Kawakami, Osaka, JP;
Yoshihiko Iwanaga, Osaka, JP;
Yosuke Watanabe, Osaka, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 473/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention can provide a solvate, a cubic crystal and a columnar crystal of 2-amino-6-benzyloxypurine by crystallization from (1) a solvent containing at least one kind of solvent selected from the group consisting of alcohol and water, (2) alcohol or (3) a water-containing solvent.