Patents by Inventor Colin M. Perrott

Colin M. Perrott 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).

  • Process for molding thermoplastic lenses and, steeply curved and/or thin lenses produced thereby
    Patent number: 6440335
    Abstract: Disclosed are novel molding methods for injection molding thermoplastic lens elements and particularly adapted for the manufacture of steeply curved and/or thin-centered lenses.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: August 27, 2002
    Assignee: Sola International, Inc.
    Inventors: Jeffrey M. Kingsbury, Robert H. Juul, Michael J. Tuhtan, Martin D. Rolph, Michael A. Morris, Colin M. Perrott, Simon J. Edwards, Ray S. Spratt
  • Contact lens designed to accommodate and correct for the effects of presbyopia
    Patent number: 5771088
    Abstract: A contact lens is disclosed which has a first optical zone (2) adapted to compensate for spherical aberration and at least one additional zone (3) which is configured to provide improved peripheral vision. Generally, the first optical zone is shaped to provide an aspheric surface and the additional zone or zones is shaped to provide a refractive power not greater than the first zone, the difference in the refractive powers of the zones being no more than about 0.75 diopter.
    Type: Grant
    Filed: September 27, 1995
    Date of Patent: June 23, 1998
    Assignee: Pilkington Barnes Hind, Inc.
    Inventor: Colin M. Perrott
  • Manufacture of visual lenses
    Patent number: 5331132
    Abstract: A consumable laser mask for forming a visual lens, especially a contact lens, in which at least a portion of the light passing through the lens is focussed by diffractive means. The laser mask is shaped to provide the diffractive means in the finished lens, and is made from a polymeric material with a thickness such that no residue is left at the completion of the laser ablation process. The invention also includes a method of manufacturing a lens using a consumable laser mask in accordance with the present invention.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: July 19, 1994
    Assignee: Pilkington Diffractive Lenses Limited
    Inventors: Michael H. Freeman, Colin M. Perrott
  • Manufacture of visual lenses
    Patent number: 5281294
    Abstract: A consumable laser mask for forming a visual lens, especially a contact lens, in which at least a portion of the light passing through the lens is focussed by diffractive means. The laser mask is shaped to provide the diffractive means in the finished lens, and is made from a polymeric material with a thickness such that no residue is left at the completion of the laser ablation process. The invention also includes a method of manufacturing a lens using a consumable laser mask in accordance with the present invention.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: January 25, 1994
    Assignee: Pilkington Diffractive Lenses Limited
    Inventors: Michael H. Freeman, Colin M. Perrott
  • Color enhancing lens
    Patent number: 5149183
    Abstract: A color enhancing sun lens comprising a lens having an integrated visible light transmission, with respect to CIE illuminant C, of less than 40% T, wherein the transmission over a 10 nm wide band centered on 480 nm and a second 10 nm wide band centered on 630 nm is at least 1.5 times the integrated visible light transmission of the lens.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: September 22, 1992
    Assignee: Pilkington Visioncare Holdings, Inc.
    Inventors: Colin M. Perrott, Kenneth J. Pidgeon