Patents by Inventor Christiaan Prozee

Christiaan Prozee 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).

  • Electric lamp having a strongly colored lamp envelope
    Patent number: 4633127
    Abstract: The lamp envelope of the electric lamp is coated at the inner surface with an electrostatically applied light-scattering pigmented powder layer. The powder layer comprises at least a cadmium-containing pigment and further a cadmium-free pigment for example in approximately equal part by weight. Although cadmium-free pigments alone cannot give lamps the desired color properties, it has been found that they are capable of replacing cadmium-containing pigments in the powder layer up to a high percentage by weight.
    Type: Grant
    Filed: January 25, 1984
    Date of Patent: December 30, 1986
    Assignee: U.S. Philips Corp.
    Inventors: Johannes H. H. Beurskens, Christiaan Prozee