Patents by Inventor Chidambaram Maltesh

Chidambaram Maltesh 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).

  • Structurally-modified polymer flocculants
    Patent number: 6753388
    Abstract: This invention is directed to structurally-modified water-soluble polymers prepared by initiating polymerization of an aqueous solution of monomers under free radical polymerization conditions to form a polymer solution and adding at least one structural modifier to the polymer solution after at least 30% polymerization of the monomers has occurred, and to use of the water-soluble cross-linked polymers as flocculating agents.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: June 22, 2004
    Assignee: Nalco Company
    Inventors: Wesley L. Whipple, Chidambaram Maltesh, Cathy C. Johnson, Ananthasubramanian Sivakumar, Tracey M. Guddendorf, Angela P. Zagala
  • Structurally-modified polymer flocculants
    Patent number: 6605674
    Abstract: This invention is directed to structurally-modified water-soluble polymers prepared by initiating polymerization of an aqueous solution of monomers under free radical polymerization conditions to form a polymer solution and adding at least one structural modifier to the polymer solution after at least 30% polymerization of the monomers has occurred, and to use of the water-soluble cross-linked polymers as flocculating agents.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: August 12, 2003
    Assignee: Ondeo Nalco Company
    Inventors: Wesley L. Whipple, Chidambaram Maltesh, Cathy C. Johnson, Ananthasubramanian Sivakumar, Tracey M. Guddendorf, Angela P. Zagala
  • Method of increasing retention and drainage in papermaking using high molecular weight water-soluble anionic or nonionic dispersion polymers
    Patent number: 6432271
    Abstract: This invention is directed to a method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective flocculating amount of a high molecular weight water-soluble anionic or nonionic dispersion polymer.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: August 13, 2002
    Assignee: Nalco Chemical Company
    Inventors: Jane B. Wong Shing, Chidambaram Maltesh, John R. Hurlock
  • Method of increasing retention and drainage in papermaking using high molecular weight water-soluble anionic or monionic dispersion polymers
    Patent number: 6331229
    Abstract: This invention is directed to a method of increasing retention and drainage in a papermaking furnish comprising adding to the furnish an effective flocculating amount of a high molecular weight water-soluble anionic or nonionic dispersion polymer.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: December 18, 2001
    Assignee: Nalco Chemical Company
    Inventors: Jane B. Wong Shing, Chidambaram Maltesh, John R. Hurlock
  • Use of diallyldimethylammonium chloride acrylamide dispersion copolymer in a papermaking process
    Patent number: 6238521
    Abstract: A papermaking process consisting essentially of: forming an aqueous cellulosic papermaking slurry; adding to the slurry certain additives, with said certain additives selected from the group including: coagulants; sizing agents; and mineral fillers; draining the slurry to form a sheet; and drying the sheet to form a paper sheet; the improvement comprising adding to the slurry, prior to it being drained; an effective amount of a cationic dispersion polymer; which cationic dispersion polymer is a copolymer comprising about 30 mole % diallyldimethylammonium chloride (DADMAC) and about 70 mole % acrylamide (AcAm); and adding to the slurry, either before or after said cationic dispersion polymer is added and the slurry is drained, a microparticle selected from the group consisting of a) copolymers of acrylic acid and acrylamide; b) bentonite; and c) dispersed silica; with the proviso that said coagulant cannot be a cationic dispersion copolymer comprising about 30 mole % diallyldimethylammonium chloride
    Type: Grant
    Filed: May 21, 1999
    Date of Patent: May 29, 2001
    Assignee: Nalco Chemical Company
    Inventors: Jane B. Wong Shing, Chidambaram Maltesh, Ramasubramanyam Nagarajan
  • Anionic and nonionic dispersion polymers for clarification and dewatering
    Patent number: 6217778
    Abstract: This invention is directed to a method of clarifying and dewatering industrial waste water using anionic and nonionic dispersion polymers.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: April 17, 2001
    Assignee: Nalco Chemical Company
    Inventors: Jane B. Wong Shing, Chidambaram Maltesh, John R. Hurlock, Elise E. Maury
  • Papermaking process utilizing hydrophilic dispersion polymers of diallyldimethyl ammonium chloride and acrylamide as retention and drainage aids
    Patent number: 6071379
    Abstract: A method for improving retention and drainage performance in a papermaking process is disclosed. The method comprises forming an aqueous cellulosic papermaking slurry, adding an effective amount of a hydrophilic dispersion polymer to the slurry, draining the slurry to form a sheet and drying the sheet. The hydrophilic dispersion polymer is preferably a copolymer of diallyldimethyl ammonium chloride and acrylamide.
    Type: Grant
    Filed: January 21, 1998
    Date of Patent: June 6, 2000
    Assignee: Nalco Chemical Company
    Inventors: Jane B. Wong Shing, John R. Hurlock, Chidambaram Maltesh, Ramasubramanyam Nagarajan