Patents by Inventor Anita N. Chan

Anita N. Chan 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).

  • Patent number: 9643031
    Abstract: The present invention relates to polygalactomannan compositions, and more particularly cationic guar gum compositions, which, when crosslinked with glyoxal, from discrete guar particles which are capable of being easily dispersed in water which permits subsequent processing of the guar, such as washing. The guar and its derivatives are desirable for use in applications such as personal care, household care products and the like.
    Type: Grant
    Filed: November 2, 2007
    Date of Patent: May 9, 2017
    Assignee: HERCULES LLC
    Inventors: Anita N. Chan, Paquita Erazo-Majewicz, Gijsbert Kroon, Thomas G. Majewicz
  • Patent number: 9561166
    Abstract: A personal or household care product includes cationic, nonionic or cationic/nonionic derivatized polysaccharide in combination with a phosphate ester surfactant. The derivatized polysaccharide polymer is formed by reacting the polysaccharide ester surfactant for a sufficient time and at a sufficient temperature in the presence of water, caustic, and at least one surfactant. The polysaccharide polymer may optionally be reacted with an oxidizing agent, hydrolytic or proteolytic enzymes, molecular weight reducing agents and a cationizing agent and nonionic agent. The formed derivatized polysaccharide has a lower clarity in water than in an aqueous surfactant system.
    Type: Grant
    Filed: February 20, 2012
    Date of Patent: February 7, 2017
    Assignee: HERCULES INCORPORATED
    Inventors: Anita N. Chan, Louis Patrick Dziuk, Jr., Paquita Erazo-Majewicz, Jashawant J. Modi, M. Olaf Michelson, Bruce Kevin Fillipo, Nabil Naouli
  • Patent number: 8796196
    Abstract: A process for producing anionic, nonionic, amphoteric or cationic derivatized polysaccharide products which demonstrate high clarity in surfactant-based compositions. The polysaccharide polymer is reacted for a sufficient time and at a sufficient temperature in the presence of water, caustic, and at least one surfactant. The polysaccharide polymer may optionally be reacted with an oxidizing agent, hydrolytic or proteolytic enzymes, molecular weight reducing agents and a cationizing agent and nonionic agent. The formed derivatized polysaccharide has a lower clarity in water than in an aqueous surfactant system. The derivatized polysaccharide product can be used in personal care and or household care products.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: August 5, 2014
    Assignee: Hercules Incorporated
    Inventors: Anita N. Chan, Louis Patrick Dziuk, Jr., Paquita Erazo-Majewicz, Jashawant J. Modi, M. Olaf Michelson
  • Publication number: 20130216489
    Abstract: A personal or household care product includes cationic, nonionic or cationic/nonionic derivatized polysaccharide in combination with a phosphate ester surfactant. The derivatized polysaccharide polymer is formed by reacting the polysaccharide ester surfactant for a sufficient time and at a sufficient temperature in the presence of water, caustic, and at least one surfactant. The polysaccharide polymer may optionally be reacted with an oxidizing agent, hydrolytic or proteolytic enzymes, molecular weight reducing agents and a cationizing agent and nonionic agent. The formed derivatized polysaccharide has a lower clarity in water than in an aqueous surfactant system.
    Type: Application
    Filed: February 20, 2012
    Publication date: August 22, 2013
    Applicant: HERCULES INCORPORATED
    Inventors: Anita N. Chan, Louis Patrick Dziuk, JR., Paquita Erazo-Majewicz, Jashawant J. Modi, M. Olaf Michelson, Bruce Kevin Fillipo, Nabil Naouli
  • Patent number: 8076279
    Abstract: The present invention is related to the use of a non-cellulosic cationically modified polysaccharide in cleaning compositions and more particularly to a surfactant based cleansing composition comprising, a surfactant, a non-cellulosic cationically modified polysaccharide and a solvent for use in personal care composition, household care composition or an institutional care composition.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: December 13, 2011
    Assignee: Hercules Incorporated
    Inventors: Piet Brand, Richard G. Brown, Anita N. Chan, Paquita Erazo-Majewicz, Jashawant J. Modi
  • Publication number: 20110213139
    Abstract: A process for producing anionic, nonionic, amphoteric or cationic derivatized polysaccharide products which demonstrate high clarity in surfactant-based compositions. The polysaccharide polymer is reacted for a sufficient time and at a sufficient temperature in the presence of water, caustic, and at least one surfactant. The polysaccharide polymer may optionally be reacted with an oxidizing agent, hydrolytic or proteolytic enzymes, molecular weight reducing agents and a cationizing agent and nonionic agent. The formed derivatized polysaccharide has a lower clarity in water than in an aqueous surfactant system. The derivatized polysaccharide product can be used in personal care and or household care products.
    Type: Application
    Filed: February 22, 2011
    Publication date: September 1, 2011
    Inventors: Anita N. Chan, Louis Patrick Dziuk, JR., Paquita Erazo-Majewicz, Jashawant J. Modi, M. Olaf Michelson
  • Publication number: 20100093584
    Abstract: The present invention is related to the use of a non-cellulosic cationically modified polysaccharide in cleaning compositions and more particularly to a surfactant based cleansing composition comprising, a surfactant, a non-cellulosic cationically modified polysaccharide and a solvent for use in personal care composition, household care composition or an institutional care composition.
    Type: Application
    Filed: October 9, 2009
    Publication date: April 15, 2010
    Applicant: HERCULES INCORPORATED
    Inventors: Piet Brand, Richard G. Brown, Anita N. Chan, Paquita Erazo-Majewicz, Jashawant J. Modi
  • Patent number: 6602994
    Abstract: A method for producing derivatized microfibrillar polysaccharide, including but not limited to cellulose, derivatized by steric and/or electrostatic forces, where the electrostatic forces are provided by anionic charge or by a combination of both anionic and cationic charge, by stabilizing and/or microfibrillating a polysaccharide starting material. A method of modifying the rheological properties of a composition of matter using derivatized microfibrillar polysaccharide. Method of improving coatings, paper manufacture, and the stability of emulsions, dispersions, and foams using a derivatized microfibrillar polysaccharide. Compositions that include derivatized microfibrillar polysaccharide, including paper compositions, comestible compositions, non-comestible spreadable compositions, and emulsions, dispersion, and foams.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: August 5, 2003
    Assignee: Hercules Incorporated
    Inventors: Mary Jean Cash, Anita N. Chan, Herbert Thompson Conner, Patrick Joseph Cowan, Robert Alan Gelman, Kate Marritt Lusvardi, Samuel Anthony Thompson, Frank Peine Tise
  • Patent number: 5804166
    Abstract: Disclosed are hair spray compositions containing non-ionic cellulosic ethers in a solvent base containing water and volatile organic solvent wherein the level of volatile organic solvent in the composition is about 80% or less, and wherein the non-ionic cellulose ether is characterized by a solution viscosity of less than about 50 cps at 25.degree. C. for an aqueous solution containing 3 wt. % solids and 55 wt. % ethanol. The preferred non-ionic cellulosic ether is methylhydroxypropyl cellulose.
    Type: Grant
    Filed: May 9, 1997
    Date of Patent: September 8, 1998
    Assignee: Hercules Incorporated
    Inventors: Anita N. Chan, Anthony B. Clayton, Jashawant J. Modi
  • Patent number: 5360840
    Abstract: Epoxy resin compositions having improved storage stability before curing and improved thermal and mechanical performance after curing comprise a mixture of a polyepoxide and a curing agent that is reactive with the polyepoxide. The epoxy resin composition is characterized by a glass transition temperature of less than 20.degree. C., measured under standard conditions, after subjecting the epoxy resin composition to a specified thermal cycle. The preferred curing agents are aromatic diamines, for example, 3,7-diaminodibenzothiophene-5,5-dioxide; 3,7-diaminophenothiazine sulfone, 3,7-diamino-N-methylphenothiazine sulfone; 2,7-diamino-9-fluorenone and 2,4,6,8-tetramethyl-3,7-diaminothioxanthene sulfone.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: November 1, 1994
    Assignee: Hercules Incorporated
    Inventors: Anita N. Chan, Brian J. Swetlin, Samuel A. Thompson, III, Chester R. Willis, Andrew B. Woodside