Patents by Inventor David Logan

David Logan 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).

  • Patent number: 5932651
    Abstract: Emulsion copolymerizing a particular crosslinker, i.e., either a siloxane or silazane, with an organic monomer, results in new and novel emulsions. An emulsion can be formed having particles consisting of polymer chains formed from organic monomer. Depending on the crosslinker and reaction conditions, these emulsion polymer chains can be either crosslinked or uncrosslinked. The uncrosslinked polymer chains can be crosslinked at a later point by the addition of a suitable catalyst.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: August 3, 1999
    Assignee: Dow Corning Corporation
    Inventors: Donald Taylor Liles, David Logan Murray
  • Patent number: 5891966
    Abstract: The present invention provides waterborne crosslinkable polymer compositions encompassing (A) functional latex polymers containing at least one pendant ethylenically unsaturated functional group, (B) a silicon hydride compound containing at least two reactive hydrogen atoms, and (C) a catalyst suitable to attain a crosslinked film.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: April 6, 1999
    Assignee: Eastman Chemical Company
    Inventors: David Logan Murray, Martha Jean Collins, James Wayne Taylor
  • Patent number: 5814287
    Abstract: This invention is directed to a catalyst system for treating internal combustion engine exhaust gases, the system having enhanced hydrocarbon trapping efficiency which is particularly advantageous during cold start. The system comprises a hydrocarbon polymerization catalyst, a hydrocarbon trap located downstream of the hydrocarbon (HC) polymerization catalyst, advanced exhaust treatment catalyst. The hydrocarbon polymerization catalyst is capable of forming larger (HC) molecules from smaller HC molecules.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: September 29, 1998
    Assignee: Ford Global Technologies, Inc.
    Inventors: Andrew Anthony Adamczyk, Jr., Anthony David Logan
  • Patent number: 5708070
    Abstract: An aqueous silicone emulsion which crosslinks by a Michael addition reaction, yielding a cured composition upon removal of the water has been prepared. The aqueous silicone emulsion comprises the product formed by mixing an organosiloxane polymer containing at least two Michael acceptor groups per organosiloxane molecule, water, a surfactant and an effective amount of a crosslinker having sufficient reactive hydrogens of a Michael donor per crosslinker molecule. The invention also describes a method for making these silicone emulsions.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Corporation
    Inventors: Eric Jude Joffre, Donald Taylor Liles, David Logan Murray, Anthony Revis
  • Patent number: 4026331
    Abstract: Loops are created at the ends of a woven papermaking machine forming fabric by a method which comprises removing weft yarns from the end of the fabric to give a weft-free zone, shortening selected ones of the warp yarns in the region of the weft-free zone, folding back the uncut warp yarns into register with respective ones of the shortened warp ends to form loops spaced transversely of the fabric, and introducing weft yarns into the resultant weftless end of the forming fabric, the crimp pattern of the individual uncut warp ends being such that when the ends are folded back the overall crimp pattern of the warp yarns in the weftless end of the forming fabric is compatible with that of the body of the forming fabric.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: May 31, 1977
    Assignee: Scapa-Porritt Limited
    Inventors: David Logan Lees, Colin Alfred Wild
  • Patent number: 3937974
    Abstract: The instant invention describes an improvement in a starter-generator arrangement in which a dynamoelectric machine is driven as a brushless DC motor to start a dynamic load such as a jet engine and as a cynchronous constant frequency generator after the jet engine is ignited and brought up to speed. A plurality of cycloconverters utilizing phase controlled rectifier banks are operated from a constant frequency supply source to supply current to the armature windings of the machine in the starting mode. Position sensing elements such as Hall generators sense the rotor position relative to the machine windings and generate enabling signals to control conduction of the phase controlled rectifiers to supply current to the proper armature windings so that the machine functions essentially as a DC brushless motor to drive a dynamic load such as a jet engine.
    Type: Grant
    Filed: August 30, 1974
    Date of Patent: February 10, 1976
    Assignee: General Electric Company
    Inventor: David Logan Lafuze
  • Patent number: D380804
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: July 8, 1997
    Inventors: Jonathan David Logan Gulla, Tyler K. Hutchison