Patents by Inventor Katherine Helen Combs

Katherine Helen Combs 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).

  • Acetylation of Chitosan
    Publication number: 20120135911
    Abstract: A process for making modified N-acetylated chitosan comprising the steps of: a) forming an aqueous solution of chitosan in aqueous acid; b) mixing the resulting solution of step a) with an acetylating agent in a chitosan:acetylating agent sub-stoichiometric amount; and c) allowing the chitosan and acetylating agent to react for a length of time sufficient for substantial completion of the acetylation reaction.
    Type: Application
    Filed: January 30, 2012
    Publication date: May 31, 2012
    Inventors: Anju Deepali Massey Brooker, Alan Thomas Brooker, Katherine Helen Combs, Larry Eugene Miller, Stephen Godfrey, Philip Robert Mallender
  • Extracting biopolymers from a biomass using ionic liquids
    Patent number: 7763715
    Abstract: Methods for using ionic liquids to extract and separate a biopolymer from a biomass containing the biopolymer are disclosed. Methods for dissolving a biopolymer in an ionic liquid are also disclosed. A recovery solvent is used to reduce the solubility of the biopolymer in the ionic liquid and conventional separation techniques are used to recover the biopolymer. Biopolymers encompassed by this invention include chitin, chitosan, elastin, collagen, keratin and polyhydroxyalkanoate.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: July 27, 2010
    Assignee: The Procter & Gamble Company
    Inventors: Stacie Ellen Hecht, Raymond Louis Niehoff, Karunakaran Narasimhan, Charles William Neal, Paul Arlen Forshey, Dean Van Phan, Anju Deepali Massey Brooker, Katherine Helen Combs
  • ACETYLATION OF CHITOSAN
    Publication number: 20090197789
    Abstract: A process for making modified N-acetylated chitosan comprising the steps of: a) forming an aqueous solution of chitosan in aqueous acid; b) mixing the resulting solution of step a) with an acetylating agent in a chitosan:acetylating agent sub-stoichiometric amount; and c) allowing the chitosan and acetylating agent to react for a length of time sufficient for substantial completion of the acetylation reaction.
    Type: Application
    Filed: January 22, 2009
    Publication date: August 6, 2009
    Inventors: Anju Deepali Massey Brooker, Alan Thomas Brooker, Katherine Helen Combs, Larry Eugene Miller, Stephen Godfrey, Philip Robert Mallender
  • Water-soluble detergent pouch
    Publication number: 20080146481
    Abstract: A packet made from a film-forming composition made from a mixture of PVOH, chitosan, and an alkali metal or ammonium bisulfite or metabisulfite where the packet contains a cleaning active is discussed.
    Type: Application
    Filed: November 13, 2007
    Publication date: June 19, 2008
    Inventors: Solomon Eli Brown, Andrew P. Verrall, Robert Aaron Schroer, Frank William Denome, Katherine Helen Combs, Larry Eugene Miller, Anju Deepali Massey Brooker