Patents by Inventor Naresh Chakrabarty

Naresh Chakrabarty 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).

  • Thick film varistor and method of producing same
    Patent number: 4186367
    Abstract: A glass-free thick film varistor operable at operating voltages ranging from about 30 to 200 volts per mm of active varistor material is produced by providing a screen-printable paste comprised of a non-glass containing substantially homogeneous mixture of granular varistor materials which have ZnO as the main component thereof and an organic binder, applying such paste in a desired pattern onto an insulating substrate and sintering such applied paste at relatively high temperatures so as to convert the paste into thick film varistors.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: January 29, 1980
    Assignee: Siemens Aktiengesellschaft
    Inventors: Naresh Chakrabarty, Richard Einzinger, Artur Weitze
  • Producing thick film circuits having terminal elements
    Patent number: 4084314
    Abstract: A process for producing a thick film circuit with terminal elements on an inorganic substrate. A paste of silver powder, copper oxide powder and organic bonding agent is silk screen printed on an inorganic substrate, dried and sintered. Then over preselected locations along individual conductor paths terminal elements are hard soldered. The conductor paths are strongly adhered to the inorganic substrate and the terminal elements are likewise strongly adhered to the individual conductor paths.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: April 18, 1978
    Assignee: Siemens Aktiengesellschaft
    Inventors: Naresh Chakrabarty, Artur Weitze