Patents by Inventor Hans Hofman

Hans Hofman 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).

  • Fluidized polymer suspensions of cationic polysaccharides in emollients and use thereof in preparing personal care compositions
    Patent number: 6113891
    Abstract: There are disclosed stable fluidized polymer suspensions containing cationic polysaccharide, stabilizing agent and emollient. The preferred cationic polysaccharides are cationic guar and cationic hydroxypropyl guar, and preferred emollients are hydrocarbons, silicone oils and esters. Processes for preparing personal care compositions utilizing the fluidized polymer suspensions are also disclosed. Using the fluidized polymer suspensions in the processes provides the advantages of more rapid dissolution and avoidance of lumps and gels when compared to using dry, powdered cationic polysaccharides.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: September 5, 2000
    Assignee: Hercules Incorporated
    Inventors: Charles Lee Burdick, Jacobus Johannes deBruin, Hans Hofman, Mohand Melbouci
  • Fluidized polymer suspensions of cationic polysaccharides in polyols and use thereof in personal care compositions
    Patent number: 6093769
    Abstract: There are disclosed stable fluidized polymer suspensions containing cationic polysaccharide, stabilizing agent and water-soluble polyol. The preferred cationic polysaccharides are cationic guar and cationic hydroxypropyl guar. Processes for preparing personal care compositions utilizing the fluidized polymer suspensions are also disclosed. Using the fluidized polymer suspensions in the processes provides advantages of more rapid dissolution and avoidance of lumps and gels when compared to using dry, powdered cationic polysaccharides.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: July 25, 2000
    Assignee: Hercules Incorporated
    Inventors: Charles Lee Burdick, Mohand Melbouci, Hans Hofman, Jacobus Johannes deBruin