Patents by Inventor Dennis T. Grendahl

Dennis T. Grendahl 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: 4543673
    Abstract: Vaulted intraocular lens including a method and apparatus for vaulting universally an intraocular lens incorporating any geometrical configuration of closed or open loops attached to a lens such as a plano-convex or the like. The vaulted intraocular lens includes a base for each loop with either flat feet or flipped feet. The method of vaulting includes a fixture assembly including a base, a retainer, and a cap, the base and retainer screwing together and encompassing the lens including the plurality of loops, and the cap fitting down through a hole in the retainer providing gravity pressure against the lens and creating the vault. The vaulted lens, as well as the fixture and method of vaulting the lens, lends itself universally to any type of lens using any predetermined geometrically shaped loops, whether the loops be closed loops or open loops.
    Type: Grant
    Filed: June 3, 1983
    Date of Patent: October 1, 1985
    Assignee: Surgidev Corporation
    Inventors: Anthony F. Drake, Fernard J. Masse, Dennis T. Grendahl
  • Patent number: 4503570
    Abstract: Intraocular lens including a plano-convex lens and a plurality of flexible closed loops spaced about a circumference of an edge of the lens, one end of each closed loop fixedly secured into a hole in the edge and the other end of the closed loop in slidable engagement with an other hole in the edge, the other hole of a larger geometrical cross section than the cross section of the slidable end of the closed loop thereby providing an all-size lens. The arms of each loop can be planar or vaulted. A geometrical section of loop material such as a U-shaped curve or S-shaped curve can be positioned in the loop providing for additional sizing, adjusting and positioning of the slidable end of the loop. Pressure-relief ports can be provided through a port in the convex surface, the plano surface, or the edge or any combination thereof. Pressure relief can also be provided through an elliptical or notched hole for the slidable end of the loop, or a notched or tapered portion of the slidable end of the loop.
    Type: Grant
    Filed: July 15, 1982
    Date of Patent: March 12, 1985
    Inventor: Dennis T. Grendahl