Patents by Inventor Nelson Grimm

Nelson Grimm 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).

  • Patent number: 4169875
    Abstract: Increased optical transmission is provided for a body of light transmissive polycrystalline alumina having relatively uniform size equiaxed grains of alumina and which is essentially free of porosity and secondary phase material. A tube of the improved optical material can be used as the light transmissive envelope for high intensity discharge lamps especially sodium and other metal vapor lamps exhibiting increased light output as a result of said improved optical transmission. A method of producing the improved optical material is also disclosed.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: October 2, 1979
    Assignee: General Electric Company
    Inventors: Harry M. Laska, Nelson Grimm
  • Patent number: 4150317
    Abstract: Increased optical transmission is provided for a body of light transmissive polycrystalline alumina having relatively uniform size equiaxed grains of alumina and which is essentially free of porosity and secondary phase material. A tube of the improved optical material can be used as the light transmissive envelope for high intensity discharge lamps especially sodium and other metal vapor lamps exhibiting increased light output as a result of said improved optical transmission. A method of producing the improved optical material is also disclosed.
    Type: Grant
    Filed: June 30, 1978
    Date of Patent: April 17, 1979
    Assignee: General Electric Company
    Inventors: Harry M. Laska, Nelson Grimm