Patents by Inventor Dwaine O. Cowan

Dwaine O. Cowan 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).

  • Electrical organic thin film switching device switching between detectably different oxidation states
    Patent number: 4652894
    Abstract: A current-controlled, bistable threshold or memory switch comprises a polycrystalline metal-organic semiconductor sandwiched between netallic electrodes. Films of either copper or silver complexed with TNAP, DDQ, TCNE, TCNQ, derivative TCNQ molecules, or other such electron acceptors provide switching between high and low impedance states with combined delay and switching times on the order of 1 nanosecond. Switching behavior of a complex of the present invention is related to the reduction potential of the acceptor molecule.
    Type: Grant
    Filed: January 15, 1985
    Date of Patent: March 24, 1987
    Assignee: The Johns Hopkins University
    Inventors: Richard S. Potember, Theodore O. Poehler, Jr., Dwaine O. Cowan
  • Method of fabricating a current controlled bistable electrical organic thin film switching device
    Patent number: 4507672
    Abstract: A current-controlled, bistable threshold or memory switch comprises a polycrystalline metal-organic semiconductor sandwiched between metallic electrodes. Films of either copper or silver complexed with TNAP, DDQ, TCNE, TCNQ, derivative TCNQ molecules, or other such electron acceptors provides switching between high and low impedance states with combined delay and switching times on the order of 1 nanosecond. Switching behavior of a complex of the present invention is related to the reduction potential of the acceptor molecule.Various other modifications, adaptations and alterations are of course possible in light of the above teachings. Therefore, it should be understood at this time that within the scope of the appended claims the invention may be practiced otherwise than as specifically described.
    Type: Grant
    Filed: June 7, 1982
    Date of Patent: March 26, 1985
    Assignee: The Johns Hopkins University
    Inventors: Richard S. Potember, Theodore O. Poehler, Dwaine O. Cowan
  • Current controlled bistable electrical organic thin film switching device
    Patent number: 4371883
    Abstract: A current-controlled, bistable threshold or memory switch comprises a polycrystalline metal-organic semiconductor sandwiched between metallic electrodes. Films of either copper or silver complexed with TNAP, DDQ, TCNE, TCNQ, derivative TCNQ molecules, or other such electron acceptors provides switching between high and low impedance states with combined delay and switching times on the order of 1 nanosecond. Switching behavior of a complex of the present invention is related to the reduction potential of the acceptor molecule.
    Type: Grant
    Filed: March 14, 1980
    Date of Patent: February 1, 1983
    Assignee: The Johns Hopkins University
    Inventors: Richard S. Potember, Theodore O. Poehler, Jr., Dwaine O. Cowan
  • Process for preparing tetraselenofulvalenes, and conductive salts obtained therefrom
    Patent number: 4246173
    Abstract: A multistep process for preparing tetraselenofulvalenes involving the synthesis of 1,3-diselenole-2-selones and -2-thiones from diselenocarbamates and .alpha.-haloketones followed by coupling of the selone or thione using a dechalkogenizing reagent. New highly conductive salts obtained by coupling certain tetraselenofulvalenes with acceptor compounds are also disclosed.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: January 20, 1981
    Assignee: The Johns Hopkins University
    Inventors: Dwaine O. Cowan, Aaron N. Bloch, Klaus Bechgaard