Patents by Inventor Roger W. Cohen

Roger W. Cohen 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).

  • Relational database system containing a multidimensional hierachical model of interrelated subject categories with recognition capabilities
    Patent number: 5721910
    Abstract: The present invention is a database and a method of producing that database which can be used to determine the meaning of scientific or technical documents, such as patents and/or technical or scientific publications and/or abstracts of these patents or publications, and to assign the technical documents to one or more scientific or technical categories within a multidimensional hierarchical model which reflects the business, scientific or technical interests of a business, scientific or technical entity or specialty.
    Type: Grant
    Filed: June 4, 1996
    Date of Patent: February 24, 1998
    Assignee: Exxon Research and Engineering Company
    Inventors: Sandra S. Unger, Sibylle Pagnucco, Roger W. Cohen, Rocco A. Fiato
  • Passive acoustic power spectra to monitor and control processing
    Patent number: 4973386
    Abstract: A process for the detection and measurement of wall coke at a specific location in a fluid bed coker through the measurement of the vibrations of the external shell of the coker at the location.
    Type: Grant
    Filed: June 29, 1988
    Date of Patent: November 27, 1990
    Assignee: Exxon Research and Engineering Company
    Inventors: Andrew J. Callegari, Eugene R. Elzinga, Jr., George D. Cody, Roger W. Cohen
  • Passive acoustic power spectra to monitor and control processing
    Patent number: 4877488
    Abstract: A process is disclosed for the detection and measurement of wall coke at a specific location in a fluid bed coker through the measurement of the vibrations of the external shell of the coker at that location.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: October 31, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: George D. Cody, Eugene R. Elzinga, Jr., Andrew J. Callegari, Roger W. Cohen
  • Resistive lens electron gun with compound linear voltage profile
    Patent number: 4243911
    Abstract: The electron gun includes a pair of electrodes between which a resistive lens structure comprising a stack of alternate apertured plates and resistive blocks is disposed. A first portion of the resistive stack is electrically paralleled with another stack of resistive blocks whereby bleeder current through the resistive lens structure results in a compound linear potential profile. The other stack of resistive blocks may comprise a second stack in the same lens structure interleaved with the apertured plates of the lens structure or it may constitute together with a different set of aperture plates a second resistive lens structure between a different pair of electrodes of the gun.
    Type: Grant
    Filed: August 28, 1979
    Date of Patent: January 6, 1981
    Assignee: RCA Corporation
    Inventors: Norman D. Winarsky, Roger W. Cohen, David P. Bortfeld, Leon J. Vieland
  • Electron gun having a distributed electrostatic lens
    Patent number: 4124810
    Abstract: A color cathode ray tube includes an electron gun having a distributed lens system which yields smaller spot sizes on a phosphor screen at intermediate and higher cathode currents when compared with prior art electrostatic lenses having similar diameters. The lens establishes an essentially exponentially increasing potential distribution along the electron beam path.
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: November 7, 1978
    Assignee: RCA Corporation
    Inventors: David P. Bortfeld, Roger W. Cohen, David A. DE Wolf