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:
Aug. 02, 2011
Filed:
Jul. 18, 2007
Johann-wilhelm Frey, Stade, DE;
Johann-Wilhelm Frey, Stade, DE;
Dow Global Technologies LLC, , US;
Abstract
A strong-acid cation exchange resin comprising a plurality of acid groups which are partially neutralized with a cation of formula (I); wherein Rat each occurrence independently is hydrogen or a Ci-4-alkyl group, Rat each occurrence independently is hydrogen, alkyl or aryl, Rat each occurrence independently is hydrogen or alkyl or two vicinal groups Rtogether form an aromatic ring, m is 1, 2, 3, 4, 5 or 6, n is 1, 2, 3 or 4, o is 1 or 2, and p is 1, 2 or 3, is useful in the production of bisphenols.
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