Patents by Inventor Rangamannar Goda

Rangamannar Goda 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).

  • Method for brightening pulp with hydrosulfite solution generated from borohydride and bisulfite
    Patent number: 7029554
    Abstract: A method for brightening pulp at a pH from 4.5 to 9. The method comprises the steps of: (a) combining an alkali metal borohydride, an alkali metal hydroxide, an alkali metal bisulfite and phosphoric acid to form a reducing solution; and (b) adding the reducing solution to a pulp slurry in an amount from 0.1% to 4% of hydrosulfite based on dry pulp fiber.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: April 18, 2006
    Assignee: Rohm and Haas Company
    Inventor: Rangamannar Goda
  • Method for bleaching and color stripping recycled fibers
    Publication number: 20040211533
    Abstract: A method for bleaching and color stripping recycled fibers by treating the fibers with a mixture of sodium borohydride and sodium bisulfite.
    Type: Application
    Filed: April 26, 2004
    Publication date: October 28, 2004
    Inventors: Qiang Huang, Rangamannar Goda, Thomas Robert Crowley, Joseph Bettano
  • Method for brightening pulp with hydrosulfite solution
    Publication number: 20040000380
    Abstract: A method for brightening pulp at a pH from 4.5 to 9. The method comprises the steps of: (a) combining an alkali metal borohydride, an alkali metal hydroxide, an alkali metal bisulfite and phosphoric acid to form a reducing solution; and (b) adding the reducing solution to a pulp slurry in an amount from 0.1% to 4% of hydrosulfite based on dry pulp fiber.
    Type: Application
    Filed: June 19, 2003
    Publication date: January 1, 2004
    Inventor: Rangamannar Goda
  • Method for brightening mechanical pulps
    Publication number: 20030062138
    Abstract: The present invention is directed to an improved method for brightening mechanical pulp under neutral or alkaline papermaking conditions. The improvement comprises the steps of: (a) separating neutral or alkaline pulp dilution water into a high-solids stream and a neutral or alkaline low-solids stream; and (b) reusing the neutral or alkaline low-solids stream for pulp dilution purposes prior to a bleaching process.
    Type: Application
    Filed: April 12, 2002
    Publication date: April 3, 2003
    Inventors: Maurice Joseph Albert Hache, Rangamannar Goda