Patents by Inventor Ralph Francis

Ralph Francis 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).

  • Method of making a low noise semiconductor device comprising a screening measurement
    Patent number: 5683917
    Abstract: The disclosed method of making a semiconductor device comprises a screening procedure that facilitates identification of devices having relatively low flicker noise. The devices are typically semiconductor diodes. The procedure utilizes our discovery of a correlation between the reverse bias current I.sub.r of a semiconductor device and the flicker noise power, and comprises measurement of the reverse bias current and comparison of the measured value with a predetermined comparison value I.sub.rc. Devices having I.sub.r .ltoreq.I.sub.rc are those that have relatively low flicker noise. The screening procedure is simple and quick, and can be readily performed in a manufacturing environment.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: November 4, 1997
    Assignee: Lucent Technologies
    Inventors: Samuel Suresh Martin, Ralph Francis Trambarulo, Cuong Tran
  • Electrolytic cell liner and seal device
    Patent number: 4081348
    Abstract: A cell liner for an electrolytic cell which covers the base plate of the cell is adapted to provide an effective seal between the base plate and the cover of the cell. Around the perimeter of the liner extends a sealing device having two parallel ribs defining a channel for receiving an elongated elastomeric extrusion of circular cross-section. The extrusion is adapted to sealably contact the sealing rim of the top cover.
    Type: Grant
    Filed: June 1, 1977
    Date of Patent: March 28, 1978
    Assignee: The B. F. Goodrich Company
    Inventor: Ralph Francis Anderson
  • Oxidation of vinylidene halides by permanganates in gaseous or aqueous process streams
    Patent number: 4062925
    Abstract: Vinylidene halides in gaseous or aqueous process streams may be oxidized effectively by contacting them with permanganic acid, at least one alkali metal permanganate, at least one alkaline earth metal permanganate, or a mixture thereof.
    Type: Grant
    Filed: January 21, 1976
    Date of Patent: December 13, 1977
    Assignee: The B. F. Goodrich Company
    Inventors: Donald Edward Witenhafer, Charles Anthony Daniels, Ralph Francis Koebel