Patents by Inventor Krishna Simhan

Krishna Simhan 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).

  • Chemical vapor deposition of coatings
    Patent number: 3951100
    Abstract: A metal oxide coating is applied to a hot glass surface by contacting the surface with a mixture of carrier air, vaporized solvent and a vaporized metal containing reactant. The mixture is directed against the glass through an elongated, converging slot-nozzle, the interior surfaces of which have an increasing radius of curvature towards the exit end, nozzle at a Reynolds number exceeding 2500 with the nozzle-to-glass spacing at least 1.25 times the characteristic dimension of the nozzle.
    Type: Grant
    Filed: September 18, 1974
    Date of Patent: April 20, 1976
    Assignee: PPG Industries, Inc.
    Inventors: John F. Sopko, Krishna Simhan
  • Vapor deposition nozzle
    Patent number: 3942469
    Abstract: A metal oxide coating is applied to a hot glass surface by contacting the surface with a mixture of carrier air, vaporized solvent and a vaporized metal containing reactant. The mixture is directed against the glass through an elongated converging nozzle having a contraction ratio of six or greater and having walls so shaped with increasing radii of curvature that a fluid flowing adjacent the walls through the nozzle is accelerated substantially throughout its passage through the nozzle.
    Type: Grant
    Filed: January 14, 1975
    Date of Patent: March 9, 1976
    Assignee: PPG Industries, Inc.
    Inventor: Krishna Simhan