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:
May. 10, 1983
Filed:
Jan. 12, 1981
Applicant:
Inventors:
Ryoji Sugamiya, Yachio, JP;
Kazuto Nakamaru, Kashiwa, JP;
Keizo Takegami, Kamakura, JP;
Koji Miwa, Yokohama, JP;
Minoru Morita, Kodaira, JP;
Assignee:
Tsukishima Kaikai Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562602 ; 562603 ;
Abstract
A mixture containing monochloroacetic acid and dichloroacetic acid as the main components are admixed with 5-25% by weight of water on the basis of sum total of monochloroacetic acid, dichloroacetic acid and water, and subjected to adiabatic cooling under a pressure of 133 to 2,660 Pa, whereby monochloroacetic acid is crystallized with a high purity.