Patents by Inventor Chandrasekha Sreekumar

Chandrasekha Sreekumar 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).

  • Crosslinked vinyl polymer particles and electrographic elements and liquid developers containing such particles
    Patent number: 4708923
    Abstract: The invention provides new crosslinked vinyl polymer particles, new coating compositions containing such particles, new liquid electrographic developers containing such particles, new electrographic elements containing one or more layers comprising such particles, and new electrographic records containing toner images and/or layers comprising such particles.The polymeric particles of the invention are characterized in that each particle has an average diameter less than one micrometer and comprises a crosslinked vinyl addition copolymer obtainable by aqueous emulsion polymerization of a mixture of monomers wherein:1.5-15 percent by weight of the mixture of monomers comprises polyfunctional vinyl addition-polymerizable monomers in order to form crosslinking structural units in the copolymer;85-98.5 percent by weight of the mixture of monomers comprises monofunctional vinyl addition-polymerizable monomers selected such that:A. 0-98.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: November 24, 1987
    Assignee: Eastman Kodak Company
    Inventors: Drewfus Y. Myers, Jr., Peter S. Alexandrovich, Glenn T. Pearce, Domenic Santilli, Chandrasekha Sreekumar, Martin A. Berwick, Donald A. Upson, William K. Goebel