Patents by Inventor Russel J. Schwartz

Russel J. Schwartz has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polymeric dispersants and dispersions containing same
    Patent number: 8530569
    Abstract: A polyalkyl benzimide polymeric dispersant produced from the reaction product of polyisobutylene amine with 1,2,4-benzenetricarboxylic anhydride, and method of preparing same and colorant dispersions containing dispersant.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: September 10, 2013
    Assignee: Sun Chemical Corporation
    Inventors: Gregory T. Huber, Tatiana N. Romanova, Russel J. Schwartz, Terence R. Chamberlain
  • Polymeric colored dispersants and colorant dispersions containing same
    Patent number: 7576146
    Abstract: Polymeric colored dispersant having the structure A-(B—X)n, where A is an organic chromophore; B is a covalently bonded linking moiety; X is a branched or linear C50-C200 polymeric covalently linked hydrocarbon, and n is an integer from 1 to 4, and low viscosity colorant dispersions containing same having a relative interfacial tension drop of less than about 1.5.
    Type: Grant
    Filed: December 5, 2003
    Date of Patent: August 18, 2009
    Assignee: Sun Chemical Corporation
    Inventors: Gregory T. Huber, Tatiana N. Romanova, Russel J. Schwartz, Terence R. Chamberlain
  • Polymeric dispersants and dispersions containing same
    Publication number: 20080033102
    Abstract: A polyalkyl benzimide polymeric dispersant produced from the reaction product of polyisobutylene amine with 1,2,4-benzenetricarboxylic anhydride, and method of preparing same and colorant dispersions containing dispersant.
    Type: Application
    Filed: December 5, 2003
    Publication date: February 7, 2008
    Inventors: Gregory T. Huber, Tatiana N. Romanova, Russel J. Schwartz, Terence R. Chamberlain