Patents by Inventor William A. Hendriks

William A. Hendriks 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).

  • Non-aqueous release from paper machine equipment
    Patent number: 6558513
    Abstract: Disclosed is a method of improving the release of paper webs from the surface of press rolls or other paper making or converting equipment by applying to such a surface non-aqueous, non-curing hydrocarbon polymer compositions. The non-curing hydrocarbon polymers have the formula (CH3)3C—[—C(R1)(R2)—C(R3)(R4)—]n—C(R5)═C(CH3)2 (I) wherein R1 through R5 are hydrogen or —CH3, with at least one of R1 through R4 being —CH3, and n is such that the number average molecular weight of such hydrocarbon polymers is from 50 to 3000. They may be hydrogenated. Preferred non-curing hydrocarbon polymers are polybutenes of the formula (CH3)3C—[—CH2—C(CH3)2—]n—CH═C(CH3)2 (II). Preferred compositions comprise at least one such hydrocarbon polymer component having a number average molecular weight from 400 to 700 and a second such component having a number average molecular weight of 100 to 400.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: May 6, 2003
    Assignee: Hercules Incorporated
    Inventors: Jacqueline K. Pease, William A. Hendriks
  • Process for controlling deposit of sticky material
    Patent number: 6517682
    Abstract: Method of inhibiting the deposit of sticky material on a papermill felt used in processing pulp slurry into sheets, comprising applying to the papermill felt at least one cationic polymer and at least one nonionic surfactant having an HLB of about 11 to 14.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: February 11, 2003
    Assignee: Hercules Incorporated
    Inventors: William A. Hendriks, Jeffrey R. Cowart
  • Process for controlling deposit of sticky material
    Patent number: 6171445
    Abstract: Method of inhibiting the deposit of sticky material on a papermill felt used in processing pulp slurry into sheets, comprising applying to the papermill felt at least one cationic polymer and at least one nonionic surfactant having an HLB of about 11 to 14.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: January 9, 2001
    Assignee: Hercules Incorporated
    Inventors: William A. Hendriks, Jeffrey R. Cowart
  • Composition for inhibiting microbial adhesion on surfaces
    Patent number: 5942219
    Abstract: A composition for controlling deposition having a high flash point and being substantially free of volatile organic compounds is disclosed, the composition being a stable solution containing a dialkylsulfosuccinate, an ethylene oxide/propylene oxide block copolymer and a mineral acid.
    Type: Grant
    Filed: December 9, 1997
    Date of Patent: August 24, 1999
    Assignee: BetzDearborn Inc.
    Inventor: William A. Hendriks
  • Method of controlling foam in aqueous systems
    Patent number: 5632860
    Abstract: A method for controlling foam in the papermaking operation comprising a polyether surfactant and polyethoxylated sorbitol hexaoleate.
    Type: Grant
    Filed: July 5, 1995
    Date of Patent: May 27, 1997
    Assignee: BetzDearborn Inc.
    Inventors: William A. Hendriks, Daniel J. Barnett
  • Antifoam composition for aqueous starch and paper coating systems
    Patent number: 5538668
    Abstract: A composition and method for controlling foam in the coating solution of a papermaking operation consisting of a polyether surfactant and polyethoxylated sorbitol hexaoleate.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: July 23, 1996
    Assignee: Betz PaperChem Inc.
    Inventor: William A. Hendriks
  • Polybutene based foam control compositions for aqueous systems
    Patent number: 5229033
    Abstract: A composition to control foam in aqueous systems such as those found in papermaking operations comprising a polybutene and at least one surfactant having a melting or pour point below 20.degree. C. The surfactants include polyethylene glycol esters, sorbitan ester, polyoxyalkylene ester, oleic diethanolamide and block copolymers of ethylene oxide and propylene oxide. Due to their low melting point, these surfactants may be blended with the polybutene at room temperature resulting in a foam control composition that is translucent, resistant to deposition and highly effective.
    Type: Grant
    Filed: February 6, 1991
    Date of Patent: July 20, 1993
    Assignee: Betz PaperChem, Inc.
    Inventors: Duy T. Nguyen, Mitzi K. Fader, William A. Hendriks