Patents by Inventor John D. Frankland

John D. Frankland 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).

  • Hydrophilic materials
    Patent number: 4900764
    Abstract: Hydrophilic polymers of the type suitable for use in making contact lenses and having a wide range of controllable properties including strength and gas permeability are formed from acrylonitrile or methyl methacrylate or an analogue thereof, 1-vinyl-2-pyrrolidinone and an appropriate amount of a cross-linking agent. Contact lenses (3) having an interferometric pattern thereon are also disclosed.
    Type: Grant
    Filed: May 18, 1988
    Date of Patent: February 13, 1990
    Inventors: Donald J. Highgate, John D. Frankland
  • Polymeric composition
    Patent number: 4768503
    Abstract: A polymeric composition is disclosed which has sealant and preferably also adhesive properties and which is suitable for use as a protective dressing for application to the skin. The composition comprises a chemically cross-linked hydrophilic polymer and a support matrix such as a high molecular weight hydrophobic polymer. The hydrophilic polymer is a water-swellable polymer which absorbs or adsorbs water but which is water-insoluble. The composition preferably includes a tackifyer which may be provided by a low molecular weight fraction of a hydrophobic matrix or by a distinct adhesive component such as a gum or a low molecular weight polymer. The composition is particularly suitable for use as a sealing ring in conjunction with a post-surgical drainage appliance wherein the hydrophilic polymer is incorporated in a form such as to provide a transmission system for liquid.
    Type: Grant
    Filed: August 1, 1985
    Date of Patent: September 6, 1988
    Assignee: Eschmann Bros. & Walsh Limited
    Inventors: Donald J. Highgate, John D. Frankland
  • Hydrophilic materials
    Patent number: 4764575
    Abstract: Hydrophilic polymers of the type suitable for use in making contact lenses and having a wide range of controllable properties including strength and gas permeability are formed from acrylonitrile or methyl methacrylate or an analogue thereof, 1-vinyl-2-pyrrolidinone and an appropriate amount of a cross-linking agent. Contact lenses (3) having an interferometric pattern thereon are also disclosed.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: August 16, 1988
    Inventors: Donald J. Highgate, John D. Frankland
  • Deformable polymeric compositions
    Patent number: 4565722
    Abstract: A shaped polymeric composition, for surgical or dental use, can absorb liquid and thereby expand or contract in one direction, substantially without similar expansion or contraction in another direction. Embodiments of the invention are breast implants, tapered dental inserts, and tubular bodies for use as nerve approximation sheaths.
    Type: Grant
    Filed: May 7, 1984
    Date of Patent: January 21, 1986
    Inventors: Donald J. Highgate, John D. Frankland