Patents by Inventor Adriaan Jan DE Ridder

Adriaan Jan DE Ridder 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).

  • High-pressure discharge lamp
    Patent number: 4117369
    Abstract: A high-pressure discharge lamp having a hydrogen getter in a metal envelope of which only a part consists of a hydrogen-permeable metal. The getter is arranged in the lamp in such manner that the hydrogen-permeable part of the envelope faces the discharge.
    Type: Grant
    Filed: September 20, 1977
    Date of Patent: September 26, 1978
    Assignee: U.S. Philips Corporation
    Inventors: Gijsbert Kuus, Adriaan Jan DE Ridder