Patents by Inventor Carl Shulman

Carl Shulman 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).

  • Mercury probe and method
    Patent number: 4587484
    Abstract: The disclosed mercury probe has a mercury reservoir and one or more passages extending from the reservoir to an aperture plate for engaging a test wafer. Dross that tends to form at the wafer-contact end of the mercury passage(s) is removed by returning all of the mercury in the passage(s) into the reservoir, where the dross is captured. Means is provided to introduce air into the passage(s) between the reservoir and the aperture(s) of the aperture plate, for disconnecting the mercury-probe segment(s) of the mercury from the reservoir and, where there are plural mercury-probe segments, for disconnecting them from each other.
    Type: Grant
    Filed: October 12, 1983
    Date of Patent: May 6, 1986
    Assignee: MSI Electronics Inc.
    Inventor: Carl Shulman
  • Mercury probes
    Patent number: 4521730
    Abstract: The disclosed mercury probe has one or more mercury reservoirs and one or more passages extending from the reservoir(s) to an aperture plate for engaging a test wafer. Dross that tends to form at the wafer-contact end of the mercury passage(s) is removed by returning all of the mercury in the passage(s) into the reservoir, where the dross is captured. Means is provided to introduce electrical insulation between the reservoir(s) and the aperture(s) of the aperture plate, for disconnecting the mercury probe segment(s) of the mercury from the reservoir(s) and, where there are plural mercury probe segments, for disconnecting them from each other and from their reservoir(s).
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: June 4, 1985
    Assignee: MSI Electronics Inc.
    Inventor: Carl Shulman
  • Mercury probe and method
    Patent number: 4409546
    Abstract: The disclosed mercury probe has a mercury reservoir and one or more passages extending from the reservoir to an aperture plate for engaging a test wafer. Dross that tends to form at the wafer-contact end of the mercury passage(s) is removed by returning all of the mercury in the passage(s) into the reservoir, where the dross is captured. Means is provided to introduce air into the passage(s) between the reservoir and the aperture(s) of the aperture plate, for disconnecting the mercury-probe segment(s) of the mercury from the reservoir and, where there are plural mercury-probe segments, for disconnecting them from each other.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: October 11, 1983
    Assignee: MSI Electronics Inc.
    Inventor: Carl Shulman