Patents by Inventor Curtis L. Karl

Curtis L. Karl 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).

  • Compostion, barrier film, and method for preventing contact dermatitis
    Patent number: 6110475
    Abstract: The present invention relates to a composition, and a method for preventing or reducing contact dermatitis. The composition contains a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optionally an additive material.The present invention is further a dermatologically-compatible barrier film for preventing and reducing contact dermatitis which contains a polysaccharide; a low molecular weight, synergistic saccharide; and optionally one or more additives. The dermatologically-compatible barrier film is formed of a composition containing a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optionally an additive material. The composition is a skin care product in a form of a lotion, a gel or a cream that is applied to skin of mammals.
    Type: Grant
    Filed: March 23, 1998
    Date of Patent: August 29, 2000
    Assignee: Hydromer, Inc.
    Inventors: Joan Dalla Riva Toma, Curtis L. Karl
  • Composition, barrier film, and method for preventing contact dermatitis
    Patent number: 5888520
    Abstract: The present invention relates to a composition, and a method for preventing or reducing contact dermatitis. The composition contains a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optionally an additive material.The present invention is further a dermatologically-compatible barrier film for preventing and reducing contact dermatitis which contains a polysaccharide; a low molecular weight, synergistic saccharide; and optionally one or more additives. The dermatologically-compatible barrier film is formed of a composition containing a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optionally an additive material. The composition is a skin care product in a form of a lotion, a gel or a cream that is applied to skin of mammals.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: March 30, 1999
    Assignee: Hydromer, Inc.
    Inventors: Joan Dalla Riva Toma, Curtis L. Karl
  • Composition, barrier film, and method for preventing contact dermatitis
    Patent number: 5851540
    Abstract: The present invention relates to a composition, and a method for preventing or reducing contact dermatitis. The composition contains a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optionally one or more additives. The present invention is further a dermatologically-compatible barrier film for preventing and reducing contact dermatitis which contains a polysaccharide; a low molecular weight, synergistic saccharide; and optionally one or more additives. The dermatologically-compatible barrier film is formed of a composition containing a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optional additives. The composition is a skin care product in a form of a lotion, a gel or a cream that is applied to skin of mammals. Once applied, the solvent in the composition evaporates, and thereby leaving behind a dermatologically-compatible barrier film containing polysaccharide and low molecular weight, synergistic saccharide.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: December 22, 1998
    Assignee: Hydromer, Inc.
    Inventors: Joan Dalla Riva Toma, Curtis L. Karl
  • Composition, barrier film, and method for preventing contact dermatitis
    Patent number: 5837266
    Abstract: The present invention relates to a composition, and a method for preventing or reducing contact dermatitis. The composition contains a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optionally one or more additives.The present invention is further a dermatologically-compatible barrier film for preventing and reducing contact dermatitis which contains a polysaccharide; a low molecular weight, synergistic saccharide; and optionally one or more additives. The dermatologically-compatible barrier film is formed of a composition containing a polysaccharide; a low molecular weight, synergistic saccharide; a solvent; and optional additives. The composition is a skin care product in a form of a lotion, a gel or a cream that is applied to skin of mammals. Once applied, the solvent in the composition evaporates, and thereby leaving behind a dermatologically-compatible barrier film containing polysaccharide and low molecular weight, synergistic saccharide.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: November 17, 1998
    Assignee: Hydromer, Inc.
    Inventors: Joan Dalla Riva Toma, Curtis L. Karl
  • Aspartame stabilization with cyclodextrin
    Patent number: 4751095
    Abstract: The present invention deals with the stabilization of aspartame, by the formation of an inclusion complex of aspartame and cyclodextrin. The inclusion complex is formed by combining the aspartame with the cyclodextrin in a medium suitable for formation of the inclusion complex before a substantial degree of hydrolysis of the aspartame can occur. Upon drying a dry inclusion complex is formed.
    Type: Grant
    Filed: April 9, 1985
    Date of Patent: June 14, 1988
    Inventors: Curtis L. Karl, Wolfram G. Schynoll
  • Thickeners having two ionic components and use thereof in aqueous compositions
    Patent number: 4655943
    Abstract: A thickener composition is comprised of a polymer having as the major recurring structural unit an acrylamidoalkanesulfonic acid or derivative thereof and a polyvalent metal crosslinking agent is provided. The compositions are useful for thickening aqueous solutions within a specified range of pH. The thickener is effective even in aqueous compositions having high levels of electrolytes.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: April 7, 1987
    Assignee: Henkel Corporation
    Inventors: Lyle F. Elmquist, Warren W. Howland, Curtis L. Karl
  • Fluid friction reduction
    Patent number: 4637418
    Abstract: Liquid containing composition, and the transport of pumping thereof are disclosed, which compositions achieve maximum fluid friction reduction properties at low concentration of a drag reducing agent such as less than 0.015% by weight and preferably less than 0.01% by weight. The drag reducing agent is a polymer of 2-acrylamido-2-methylpropanesulfonic acid. Finely divided solids, such as coal, may be suspended therein.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: January 20, 1987
    Assignee: Henkel Corporation
    Inventor: Curtis L. Karl
  • Synergistic thickener mixtures of amps polymers with other thickeners
    Patent number: 4540510
    Abstract: Synergistic thickener mixture comprising a mixture of a polymer of 2-acrylamido-2-methylpropane sulfonic acid and certain water soluble polymers such as the galactomannan gums, derivatives thereof, cellulose derivatives and polyoxyalkylene oxide polymers. The composition finds utility in earth formation fracturing, textile print pastes, suspending pigments in paints and gelling alcohol-based cosmetic formulations.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: September 10, 1985
    Assignee: Henkel Corporation
    Inventor: Curtis L. Karl