Patents by Inventor Sujal N. Bhalakia

Sujal N. Bhalakia 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).

  • Multi-focal optical elements
    Patent number: 5856860
    Abstract: A multi-focal lens with both a power portion and a functional portion, where the power portion imparts a majority of the optical power and magnification characteristics to the multi-focal lens and has a front side with both a main focal surface and a secondary focal surface that is discontinuous relative to the main focal surface and where the functional portion has a rear side that is shaped like the front side of the power portion with the rear side of the functional portion being affixed to the front side of the power portion.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: January 5, 1999
    Assignee: Vision-Ease Lens, Inc.
    Inventors: Sujal N. Bhalakia, Thomas J. Moravec
  • Production of optical elements
    Patent number: 5827614
    Abstract: A method of making an optical element that includes a thermoplastic power portion, the method including laminating a first thermoplastic sheet to one side of a functional film, laminating a second thermoplastic sheet to a second side of the functional film, and affixing either the first thermoplastic sheet or the second thermoplastic sheet to the power portion, with the other of the first or second thermoplastic sheets being open to atmosphere.
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: October 27, 1998
    Assignee: Vision-Ease Lens, Inc.
    Inventors: Sujal N. Bhalakia, Thomas J. Moravec
  • Multifocal optical elements
    Patent number: 5757459
    Abstract: A multi-focal lens with both a power portion and a functional portion where the power portion imparts a majority of the optical power and magnification characteristics to the multi-focal lens and has a front side with both a main focal surface and a secondary focal surface that is recessed relative to the main focal surface and where the functional portion has a rear side that is shaped like the front side of the power portion with the rear side of the functional portion being affixed to the front side of the power portion.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: May 26, 1998
    Assignee: Vision-Ease Lens, Inc.
    Inventors: Sujal N. Bhalakia, Thomas J. Moravec