Patents by Inventor Hans O. Larsen

Hans O. Larsen 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).

  • Method of forming shaped hydrogel articles
    Patent number: 4680336
    Abstract: A method for forming shaped hydrogel articles such as soft contact lenses wherein hydrophilic monomers are mixed with an inert diluent prior to polymerization, and the diluent is replaced with water following the polymerization. Diluents yielding optically clear hydrogels with good mechanical properties are selected on the basis of their viscosity and their Hanson cohesion parameters relative to the cohesion parameters of the polymeric component of the hydrogel.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: July 14, 1987
    Assignee: Vistakon, Inc.
    Inventors: Hans O. Larsen, Ture Kindt-Larsen
  • Molding frame for lenses
    Patent number: D281505
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: November 26, 1985
    Assignee: Mia Lens Production A/S
    Inventors: Hans O. Larsen, Ture Kindt-Larsen