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:
Jan. 30, 1979
Filed:
Feb. 03, 1977
Applicant:
Inventor:
Thomas J Walter, Baton Rouge, LA (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562580 ; 26050117 ;
Abstract
It is disclosed that water soluble carboxyalkoxy succinate tetrahydrate salt can be precipitated in high purity from alcohol-water solvent systems when operating at temperatures from about 50.degree. C to about 100.degree. C using seed crystals of either tetrahydrate or pentahydrate form or a mixture thereof. Useful temperatures are from about 45.degree. to about 75.degree. C. Preferred temperatures are above about 55.degree. C up to about 65.degree. C where tetrahydrate product is obtainable even where pentahydrate seed is used.