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:
Apr. 08, 2014
Filed:
Sep. 24, 2010
Andrew M. Krol, Bristol, CT (US);
Ernest Long, Burlington, CT (US);
Lev Taytsas, Naugatuck, CT (US);
Andrew M. Krol, Bristol, CT (US);
Ernest Long, Burlington, CT (US);
Lev Taytsas, Naugatuck, CT (US);
Other;
Abstract
A process of making a polymeric phenazonium compound having the general formula: wherein R, R, R, R, R, Rand Rare the same or different, and represent hydrogen, a low alkyl or a substituted aryl, Rstarts with NHand is diazotized followed by polymerization, Rand Rmay alternatively represent monomeric or polymeric phenazonium radicals, Rwith its substituent group is a substituted amine, with Rand Rrepresenting any combination of CH, CH, and hydrogen, except that Rand Rcannot both be hydrogen, A is an acid radical, and n is an integer from 2 to 100, preferably from 2 to 20 is described. The polymeric phenazonium compound is usable in as an additive in a metal plating bath. The method includes the steps of: a) dissolving an effective amount of an amino compound in a formic acid solution; b) adding a nitrite salt to diazotize the amino compound; and c) adding sulfamic acid to neutralize any excess nitrous acid that may be formed in step b), whereby a polymeric phenazonium compound is produced.