Patents by Inventor Leonld Landa

Leonld Landa 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).

  • Grey glass composition
    Patent number: 7135425
    Abstract: A grey glass composition employing as its colorant portion at least iron (Fe2O3/FeO), cobalt and possibly erbium oxide (e.g., Er2O3) is provided. The glass enables high visible transmission, and satisfactory IR absorption, while at the same time achieving desired grey color. In certain example embodiments, the colorant portion includes: total iron (expressed as Fe2O3): <=0.35% erbium oxide (e.g., Er2O3): 0 to 0.3% selenium (Se): <=15 ppm cobalt oxide (e.g., Co3O4): 5 to 60 ppm glass redox: >=0.35. In other example embodiments, the glass may include higher total iron and/or a lower minimum redox.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: November 14, 2006
    Assignee: Guardian Industries Corp.
    Inventors: Scott V. Thomsen, Richard Hulme, Ksenia A. Landa, Leonld Landa
  • Grey glass composition
    Publication number: 20040116271
    Abstract: A grey glass composition employing as its colorant portion at least iron (Fe2O3/FeO), cobalt and possibly erbium oxide (e.g., Er2O3) is provided. The glass enables high visible transmission, and satisfactory IR absorption, while at the same time achieving desired grey color. In certain example embodiments, the colorant portion includes: 1 total iron (expressed as Fe2O3): <=0.35% erbium oxide (e.g., Er2O3): 0 to 0.3% selenium (Se): <=15 ppm cobalt oxide (e.g., Co3O4): 5 to 60 ppm glass redox: >=0.35.
    Type: Application
    Filed: December 13, 2002
    Publication date: June 17, 2004
    Inventors: Scott V. Thomsen, Richard Hulme, Ksenia A. Landa, Leonld Landa