Patents by Inventor H. David Alcaide

H. David Alcaide 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).

  • Vacuum monitoring
    Patent number: 4008619
    Abstract: Monitoring of gas contamination and of related deviations in pressures within a sealed cavity is effected by way of electrical-network responses to conduction characteristics of a thin-film deposit of getter material within the cavity, the getter film being deposited upon inert insulation between conductive contacts externally connected into an electrical circuit which controls related output signalling in accordance with conductance changes caused by getter material reactions with gas within the cavity.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: February 22, 1977
    Assignee: MKS Instruments, Inc.
    Inventors: H. David Alcaide, James H. Ewing