Patents by Inventor Maurice Joseph Albert Hache

Maurice Joseph Albert Hache 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 virgin mechanical pulp
    Patent number: 7163564
    Abstract: A method for brightening virgin mechanical pulp. The method comprises combining: (i) an aqueous solution comprising sodium borohydride and sodium hydroxide; and (ii) an aqueous solution comprising sodium bisulfite, in a chemical mixer and adding output of the chemical mixer to an aqueous slurry of virgin mechanical pulp. The ratio of (moles bisulfite?moles hydroxide)/moles borohydride is from 0 to 7.8.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: January 16, 2007
    Inventors: Jean Luc Sibiet, Sundar Chellappan Jaya Krishnan, Joseph Najim, Maurice Joseph Albert Hache
  • Method for brightening virgin mechanical pulp
    Publication number: 20040117914
    Abstract: A method for brightening virgin mechanical pulp. The method comprises combining: (i) an aqueous solution comprising sodium borohydride and sodium hydroxide; and (ii) an aqueous solution comprising sodium bisulfite, in a chemical mixer and adding output of the chemical mixer to an aqueous slurry of virgin mechanical pulp. The ratio of (moles bisulfite−moles hydroxide)/moles borohydride is from 0 to 7.8.
    Type: Application
    Filed: October 31, 2003
    Publication date: June 24, 2004
    Inventors: Jean Luc Sibiet, Sundar Chellappan Jaya Krishnan, Joseph Najim, Maurice Joseph Albert Hache
  • 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