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:
Nov. 30, 1976
Filed:
Jan. 28, 1975
Applicant:
Inventors:
Assignee:
Nippon Kayaku Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
26050112 ; 260519 ;
Abstract
Optically active p-hydroxyphenylglycine is manufactured by inoculating a supersaturated solution of a p-hydroxyphenylglycine sulfonic acid derivative salt comprising a mixture of the two optically active enantiomers of said salt with an optically active enantiomer of the same salt, said mixture being either racemic or else one in which the predominant enantiomer is that of the inoculant. In this manner the enantiomer having the form of the inoculant is selectively crystallized. The selectively crystallized salt is thereafter treated for removal of the sulfonic acid derivative.