Patents by Inventor Dennis R. Gifford

Dennis R. Gifford 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).

  • Electrostatic enhancement of inlet particle separators for engines
    Patent number: 10913073
    Abstract: The present invention includes a device, a system, and a method for enhancing a particle separation efficiency, including a particle charging device adapted to impart predominately unipolar charging on a plurality of particles in a fluid stream, e.g. a gas stream; wherein the particle charging device is positioned upstream from and adapted to provide the plurality of particles charged by the particle charging device to a particle deflection device capable of separating the particles charged by the particle charging device from a core fluid flow that is substantially free of dust particles.
    Type: Grant
    Filed: January 9, 2018
    Date of Patent: February 9, 2021
    Assignee: Lynntech, Inc.
    Inventors: Sanil John, Dennis R. Gifford, Seth Cocking, Jady Samuel Stevens, Michael William Martin, Geoffrey Duncan Hitchens, David Battaglia
  • ELECTROSTATIC ENHANCEMENT OF INLET PARTICLE SEPARATORS FOR ENGINES
    Publication number: 20180193848
    Abstract: The present invention includes a device, a system, and a method for enhancing a particle separation efficiency, including a particle charging device adapted to impart predominately unipolar charging on a plurality of particles in a fluid stream, e.g. a gas stream; wherein the particle charging device is positioned upstream from and adapted to provide the plurality of particles charged by the particle charging device to a particle deflection device capable of separating the particles charged by the particle charging device from a core fluid flow that is substantially free of dust particles.
    Type: Application
    Filed: January 9, 2018
    Publication date: July 12, 2018
    Inventors: Sanil John, Dennis R. Gifford, Seth Cocking, Jady Samuel Stevens, Michael William Martin, Geoffrey Duncan Hitchens, David Battaglia
  • Homogeneous catalysts and olefin polymerization process
    Patent number: 5194532
    Abstract: Olefins are polymerized in the presence of a homogeneous catalyst represented by the formula LTi(NR.sub.2).sub.3 wherein L is a .pi.-bonded ligand selected from the group consisting of indenyl, C.sub.1 -C.sub.4 alkyl substituted indenyl, --OSiR.sub.3 substituted indenyl, R is a C.sub.1 -C.sub.4 alkyl group wherein each R attached to the same nitrogen atom is the same, but the R groups attached to different nitrogen atoms can be the same or different from those attached to the other nitrogen atoms.
    Type: Grant
    Filed: June 12, 1992
    Date of Patent: March 16, 1993
    Assignee: The Dow Chemical Company
    Inventors: John G. Hefner, Brian W. S. Kolthammer, Dennis R. Gifford
  • Iron or aluminum precipitation in strong acid systems
    Patent number: 4758414
    Abstract: The precipitation of iron and aluminum from their solutions in strong acids, eg. 18% HCl and 25% H.sub.2 SO.sub.4, is accomplished by adding to the acid solution certain organic aminophosphonic acids in which at least 50% of the amine hydrogens have been substituted with methylenephosphonic acid groups. Particularly preferred compounds are the methylenephosphonic acid derivatives of ammonia and polyalkylenepolyaminepoly(methylenephosphonic acids). The completely phosphonomethylated derivatives are most preferred.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: July 19, 1988
    Assignee: The Dow Chemical Company
    Inventors: Dennis R. Gifford, Marvin L. Dettloff