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:
Oct. 31, 1989
Filed:
Jan. 11, 1989
Applicant:
Inventors:
Robert P Shirtum, Freeport, TX (US);
Elaine B Darby, San Antonio, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C08G / ;
U.S. Cl.
CPC ...
528 95 ; 525507 ; 525509 ; 528 87 ; 549514 ; 549515 ; 549517 ;
Abstract
The construction costs of a process for preparing epoxy compounds from aromatic compounds containing an active hydrogen atom reactive with an epihalohydrin by reacting such compounds with an epihalohydrin in the presence of an alkali metal hydroxide while controlling the water content in the reaction mixture and subsequently removing the alkali metal halide salt from the reaction mixture is made less costly by employing a water extraction means to remove the alkali metal halide salts from the reaction product mixture containing the epoxy product.