Patents by Inventor Mark J. Harper

Mark J. Harper 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).

  • Aminonitrile production
    Patent number: 6841507
    Abstract: Provided is a selective hydrogenation process for producing aminonitriles by contacting the corresponding dinitriles with a hydrogen-containing fluid in the presence of a hydrogenation catalyst, a solvent and an additive for improving the yield of and/or selectivity to the aminonitrile.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: January 11, 2005
    Assignee: Invista North America S.A.R.L.
    Inventors: Alex Sergey Ionkin, Stanislaw Bodgan Ziemecki, Mark J. Harper, Theodore Augur Koch, Henry Edward Bryndza
  • Aminonitrile production
    Publication number: 20040102644
    Abstract: Provided is a selective hydrogenation process for producing aminonitriles by contacting the corresponding dinitriles with a hydrogen-containing fluid in the presence of a hydrogenation catalyst, a solvent and an additive for improving the yield of and/or selectivity to the aminonitrile.
    Type: Application
    Filed: November 6, 2003
    Publication date: May 27, 2004
    Inventors: Alex Sergey Ionkin, Stanislaw Bodgan Ziemecki, Mark J. Harper, Theodore Augur Koch, Henry Edward Bryndza
  • Process for hydrogenating dinitriles in aminonitriles
    Patent number: 6680403
    Abstract: Provided is a selective hydrogenation process for producing aminonitriles by contacting the corresponding dinitriles with a hydrogen-containing fluid in the presence of a hydrogenation catalyst, a solvent and an additive for improving the yield of and/or selectivity to the aminonitrile. The additive comprises a carbon monoxide; a tetraalkylammonium hydroxide compound; a tetraalkylphosphonium hydroxide compound; a multi-centered metal carbonyl cluster; an organic isonitrile; a cyanide compound having at least one cyano group bound to other than a carbon atom; and afluoride compound.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: January 20, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Alex Sergey Ionkin, Stanislaw Bodgan Ziemecki, Mark J. Harper, Theodore Augur Koch, Henry Edward Bryndza
  • Dual winch nuclear fuel transfer system providing more reliable fuel transfer during refueling operations
    Patent number: 5069863
    Abstract: A transfer system moves fuel assemblies along a track extending through a transfer tube within a containment wall in a nuclear power plant between the auxiliary building side and the containment building side. A car carries a basket for the assemblies. Two winches are located on the auxiliary building side above the water level existing over the track during refueling operations. The winches operate respective pairs of cables, driving the car in either direction. Four sheaves respectively direct the cables to the horizontal direction along the track. One pair of cables is secured to a yoke on the car to drive the car away from the containment building. Two horizontal sheaves are located near the containment end of the transfer tube. The other two cables extend horizontally along the track from the vertical sheaves to the horizontal sheaves, redirecting them to extend horizontally in the reverse direction. These return cables are secured to the yoke to drive the car toward the containment building.
    Type: Grant
    Filed: July 10, 1989
    Date of Patent: December 3, 1991
    Assignee: Westinghouse Electric Corp.
    Inventors: Robert E. Meuschke, Mark J. Harper, David J. Stefko