Patents by Inventor Arthur G. Duppstadt

Arthur G. Duppstadt 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).

  • Patent number: 6764180
    Abstract: A multifocal contact lens structured to provide simultaneous distant and near vision includes a transparent lens body having an inner concave surface and an outer convex surface. The lens body has an aspherical central portion structured to provide distant vision and an adjacent annular spherical portion structured to provide near vision. The aspherical central portion, and annular spherical portion may be provided on the inner surface of the lens. In an alternate embodiment, a spherical central near vision portion and an annular aspheric distance vision portion may be employed. The spherical and aspherical portions merge in a gradual manner to avoid undesired liner of demarcation therebetween.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: July 20, 2004
    Inventor: Arthur G. Duppstadt
  • Patent number: 6709102
    Abstract: A multifocal contact lens structured to provide simultaneous distant and near vision includes a transparent lens body having an inner concave surface and an outer convex surface. The lens body has an aspherical central portion structured to provide distant vision and an adjacent annular spherical portion structured to provide near vision. The aspherical central portion, and annular spherical portion may be provided on the inner surface of the lens. In an alternate embodiment, a spherical central near vision portion and an annular aspheric distance vision portion may be employed. The spherical and aspherical portions merge in a gradual manner to avoid undesired liner of demarcation therebetween.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: March 23, 2004
    Inventor: Arthur G. Duppstadt
  • Patent number: 6659606
    Abstract: An alignment apparatus establishes alignment of an eyeglass hinge assembly. The eyeglass hinge assembly includes an attachment member attachable to an eyeglass frame, a first hinge element secured to a temple member, a second hinge element secured to the attachment member, and a hinge spring disposed between the temple member and the first hinge element to permit flexion of the temple member. The hinge spring movably attaches a single, central hinge ring to the temple member. The alignment apparatus secures a temple member in a clamp having opposing first and second clamp elements. Adjustable extending means on a rotating arm secured to the second clamp element extends to engage and displace the single, central hinge ring to deform the hinge spring establishing alignment with a pair of spaced-apart, opposing hinge rings on the second hinge element. An associated method is provided.
    Type: Grant
    Filed: March 12, 2003
    Date of Patent: December 9, 2003
    Inventor: Arthur G. Duppstadt
  • Publication number: 20020186345
    Abstract: A multifocal contact lens structured to provide simultaneous distant and near vision includes a transparent lens body having an inner concave surface and an outer convex surface. The lens body has an aspherical central portion structured to provide distant vision and an adjacent annular spherical portion structured to provide near vision. The aspherical central portion, and annular spherical portion may be provided on the inner surface of the lens. In an alternate embodiment, a spherical central near vision portion and an annular aspheric distance vision portion may be employed. The spherical and aspherical portions merge in a gradual manner to avoid undesired liner of demarcation therebetween.
    Type: Application
    Filed: July 18, 2002
    Publication date: December 12, 2002
    Inventor: Arthur G. Duppstadt
  • Publication number: 20020093623
    Abstract: A multifocal contact lens structured to provide simultaneous distant and near vision includes a transparent lens body having an inner concave surface and an outer convex surface. The lens body has an aspherical central portion structured to provide distant vision and an adjacent annular spherical portion structured to provide near vision. The aspherical central portion, and annular spherical portion may be provided on the inner surface of the lens. In an alternate embodiment, a spherical central near vision portion and an annular aspheric distance vision portion may be employed. The spherical and aspherical portions merge in a gradual manner to avoid undesired liner of demarcation therebetween.
    Type: Application
    Filed: January 16, 2001
    Publication date: July 18, 2002
    Inventor: Arthur G. Duppstadt
  • Patent number: 4979337
    Abstract: A polishing tool for contact lenses and an associated method is provided. The polishing tool is comprised of a base, an exteriorly convex resilient polishing head, and a polishing cloth. The polishing head is made of a suitable resilient material, said material allowing the polishing head to better conform to the interior portion of the contact lens. The method of the present invention involves connecting the polishing tool to a rotatable shaft and exposing the rotating polishing head to the interior of the contact lens. The polishing head can be adapted, in another embodiment, to polish the edges and the outside and peripheral bevels of a contact lens.
    Type: Grant
    Filed: October 3, 1986
    Date of Patent: December 25, 1990
    Inventor: Arthur G. Duppstadt