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. 08, 1984
Filed:
Nov. 24, 1982
Applicant:
Inventor:
Ashok K Mendiratta, Schenectady, NY (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568724 ; 210634 ;
Abstract
An efficient method of purifying bisphenol-A is presented whereby solvent washing of the bisphenol-A crystals and extraction of impurities, bisphenol-A and phenol from the aqueous liquid of a water/bisphenol-A crystal slurry is accomplished simultaneously and in a continuous operation. The method involves contacting the water/bisphenol-A crystals with an organic washing solvent in a continuous, multi-stage, countercurrent extraction column.
Mendiratta, Ashok. (1984). Purification of bisphenol-a (U.S. Patent No. 4447655). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4447655
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile