Patents by Inventor Mool C. Gupta

Mool C. Gupta 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 making an optical device
    Patent number: 5130857
    Abstract: A method is disclosed for making an optical device which is adapted to diffract an incident beam of radiation to form a plurality of discrete diffracted beams of different orders. The optical device comprises two diffraction gratings which are supported on a substrate and are separated from each other by a thin film. In order to obtain the advantages of a doubly-periodic structure, the thickness of the thin film between the two gratings is very accurately controlled to be on the order of the wavelength of the incident beam of radiation.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: July 14, 1992
    Assignee: Eastman Kodak Company
    Inventors: Mool C. Gupta, Song-Tsuen Peng
  • Optical recording and information elements
    Patent number: 4578684
    Abstract: Optical recording elements having metal reflective layers which are coated on both sides with a ceramic overcoat are disclosed.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: March 25, 1986
    Assignee: Eastman Kodak Company
    Inventors: Mool C. Gupta, Douglas G. Stinson
  • Ceramic overcoated optical recording element
    Patent number: 4538159
    Abstract: A recording element comprising a support having thereon a heat-deformable optical recording layer having a transparent ceramic overcoat characterized in that the overcoat has a thickness up to about 0.05 .mu.m is disclosed.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: August 27, 1985
    Assignee: Eastman Kodak Company
    Inventors: Mool C. Gupta, Joseph J. Wrobel, Dennis G. Howe
  • Erasable, reusable optical recording element and method
    Patent number: 4527173
    Abstract: An erasable, reusable recording element comprising a support having thereon a heat-deformable optical recording layer having a transparent overcoat is disclosed.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: July 2, 1985
    Assignee: Eastman Kodak Company
    Inventors: Mool C. Gupta, Joseph J. Wrobel, Forrest C. Strome, Jr.