Patents by Inventor Daniel R. Nelson

Daniel R. Nelson 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).

  • Valve for a fire hose line
    Patent number: 7255131
    Abstract: A valve for a hose line, the valve having an inlet having a threaded female swivel fitting, a first outlet having an external thread, and a second outlet having an external thread. The inlet and the first outlet are at a 90 degree angle to each other and the inlet and the second outlet are 180 degrees to each other. A three-port ball valve having an inlet port, a first outlet port, and a second outlet port controls the directional flow within the valve.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: August 14, 2007
    Inventors: John C. Paper, Daniel R. Nelson
  • Fumarate copolymers and acylated alkanolamines as low temperature flow improvers
    Patent number: 6017370
    Abstract: The low temperature flow properties of wax-containing liquids are improved by adding a composition comprising (i) a polymer of a C.sub.8-20 alkyl ester of an ethyleneically unsaturated 1,2-diacid, and (ii) the reaction product of an alkanolamine with a C.sub.8-50 hydrocarbyl-substituted acylating agent.
    Type: Grant
    Filed: September 25, 1998
    Date of Patent: January 25, 2000
    Assignee: The Lubrizol Corporation
    Inventors: John S. Manka, Kim L. Ziegler, Daniel R. Nelson