Patents Assigned to Wilmington Partners L.P.
  • Aspheric multifocal contact lens having concentric front surface
    Patent number: 5835187
    Abstract: The present invention relates to a multifocal contact lens having an edge, a front and back side and a series of concentrically arranged zones comprising central zone, a marginal zone and a peripheral zone. Each of the zones on the back side of the lens is defined by a second-order surface of revolution other than spherical. The front side of the lens comprises multiple spherical surfaces for providing increasing power correction from the central zone toward the peripheral zone.
    Type: Grant
    Filed: November 22, 1996
    Date of Patent: November 10, 1998
    Assignee: Wilmington Partners L.P.
    Inventor: Richard R. Martin
  • Method for wetting contact lenses
    Patent number: 5711823
    Abstract: A method for treating contact lenses with solutions including a material having (a) a hydrophobic core having at least three carbon atoms and (b) at least three hydrophilic polyethylene oxide chains attached to the core.
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: January 27, 1998
    Assignee: Wilmington Partners L.P.
    Inventors: Edward J. Ellis, Jeanne Y. Ellis
  • Composition for cleaning contact lenses
    Patent number: 5607908
    Abstract: A composition for cleaning contact lenses comprises a silicone surface active agent having cleaning activity for contact lens deposits. The silicone surface active agent has at least one side chain including a radical ionizable in aqueous solution.
    Type: Grant
    Filed: March 16, 1995
    Date of Patent: March 4, 1997
    Assignee: Wilmington Partners L.P.
    Inventors: Chimpiramma Potini, Stanley J. Wrobel
  • Aspheric multifocal contact lens
    Patent number: 5436678
    Abstract: Contact lenses, particularly adapted to correct presbyopic vision, having a multiaspheric back surface having a central zone, a marginal zone, and a peripheral zone, each of the zones being constituted by portions of second-order surfaces of revolution other than spherical, wherein the axial edge lift of the central and marginal zones increase toward the edge of the lens, the transition from the central to the marginal zone is tangential, and the axial edge lift of the peripheral zone decreases toward the edge of the lens.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: July 25, 1995
    Assignee: Wilmington Partners L.P.
    Inventor: Elizabeth A. Carroll
  • Contact lens solution containing cationic glycoside
    Patent number: 5405878
    Abstract: Compositions for treating contact lenses, particularly rigid, gas permeable contact lenses, comprise a quaternary nitrogen-containing ethoxylated alkyl glucoside.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: April 11, 1995
    Assignee: Wilmington Partners L.P.
    Inventors: Edward J. Ellis, Jeanne Y. Ellis
  • Method of treating contact lenses
    Patent number: 5401327
    Abstract: Methods of treating contact lenses employ a material composed of (a) a hydrophobic core having at least three carbon atoms and (b) at least three hydrophilic polyethylene oxide chains attached to the core.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: March 28, 1995
    Assignee: Wilmington Partners L.P.
    Inventors: Edward J. Ellis, Jeanne Y. Ellis