Patents by Inventor Lee O. Upton

Lee O. Upton 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 increasing the strength of silicate glass laser rods
    Patent number: 3982917
    Abstract: Glass laser rods are treated and strengthened by a method which produces a ardened surface that protects the laser rods from physical abrasion, prevents failure due to thermal shock, and removes flaws while not interfering with light pumping through the sides of the treated rods. The method includes subjecting the prepared glass laser rods to an acid polishing procedure which employs an acid polishing solution comprised of equal parts of concentrated hydrofluoric and concentrated nitric acid.
    Type: Grant
    Filed: February 4, 1975
    Date of Patent: September 28, 1976
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Lee O. Upton
  • Photochromic multifocal lenses
    Patent number: 3975093
    Abstract: A high index of refraction, low softening point, low expansion segment glass is fused into a countersunk photochromic glass blank of lower index of refraction. The high index of refraction segment is primarily composed of SiO.sub.2, B.sub.2 O.sub.3, and PbO with lesser amounts of other oxides.
    Type: Grant
    Filed: December 23, 1974
    Date of Patent: August 17, 1976
    Assignee: American Optical Corporation
    Inventor: Lee O. Upton
  • Photochromic multifocal lenses
    Patent number: 3975092
    Abstract: A high index of refraction, low softening point, low expansion segment glass is fused into a countersunk photochromic glass blank of lower index of refraction. The high index of refraction segment is primarily composed of SiO.sub.2, B.sub.2 O.sub.3 and PbO with lesser amounts of other oxides.
    Type: Grant
    Filed: November 9, 1973
    Date of Patent: August 17, 1976
    Assignee: American Optical Corporation
    Inventor: Lee O. Upton