Patents by Inventor Steve Bennington

Steve Bennington 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).

  • Method of producing durable bonds between an optical preform and an optical resin layer cast on the preform surface
    Patent number: 5316702
    Abstract: A method of casting an ophthalmic optic is described. A mold, an optical preform and a polymerizable resin are provided. The resin is disposed between the mold and the optical preform. The preform and the resin interact to produce a contact angle between the resin and preform of from about 20 degrees to about 45 degrees; or the mold and the resin interact to produce a contact angle between the mold and the resin of from about 45 to about 75 degrees; or both. The polymerizable resin is then cured.Another method of casting an ophthalmic optic is also described. A mold, an optical preform and a polymerizable resin are provided. The optical preform is supplied with a surface having a regular pattern of grooves that comprise a grid formed by intersecting curves or lines imprinted on the surface of the optical preform. The polymerizable resin is provided between the optical preform and the mold such that the polymerizable resin contacts the regular pattern of grooves on the optical preform.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: May 31, 1994
    Assignee: InnoTech, Inc.
    Inventors: Ronald D. Blum, Amitava Gupta, Steve Bennington