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:
Sep. 29, 2020
Filed:
Jun. 14, 2019
Applicant:
Yamasa Corporation, Choshi-shi, JP;
Inventors:
Hisaki Tanaka, Choshi, JP;
Kazuya Ishige, Choshi, JP;
Assignee:
Yamasa Corporation, Choshi-shi, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07H 19/207 (2006.01); C07H 19/213 (2006.01); C07H 1/00 (2006.01);
U.S. Cl.
CPC ...
C07H 19/207 (2013.01); C07H 1/00 (2013.01); C07H 19/213 (2013.01);
Abstract
A crystal of free acid of 3',5′-cyclic diguanylic acid containing no metal salt with cobalt, magnesium or the like is provided. A method is sought for obtaining said crystal in a large amount and with ease. By a manufacturing method comprising a step of adding acid to an aqueous solution of 3′,5′-cyclic diguanylic acid so as to lower pH to 1 to 3, crystals of 3′,5′-cyclic diguanylic acid can be obtained in a large amount with ease. Said crystals are free acid crystals which do not contain a metal salt with cobalt, magnesium or the like.