Patents by Inventor Ellen S. Lenz

Ellen S. Lenz 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).

  • Upgrading drip oil
    Patent number: 7527725
    Abstract: A method is disclosed for upgrading drip oil comprising subjecting the drip oil to multiple distillation steps to form a stream rich in aromatics and a separate stream rich in dicyclopentadiene.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: May 5, 2009
    Assignees: Equistar Chemicals, LP, Lyondell Chemical Technology, L.P.
    Inventors: Krishnan Viswanathan, Lau S. Yang, Ellen S. Lenz, David W. Leyshon
  • Drycleaning method using dipropylene glycol dimethyl ether
    Patent number: 7144850
    Abstract: A drycleaning method is disclosed. In the method, a composition that comprises at least about 85 wt. % dipropylene glycol dimethyl ether (DMM) is used. The limited solubility of water in DMM is ideal for drycleaning. The method provides good stain removal and fast drying while avoiding excessive fabric shrinkage or soil redeposition.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: December 5, 2006
    Assignee: Lyondell Chemical Technology, L.P.
    Inventors: Paul E. Galick, David R. Kinney, Ellen S. Lenz, Larry W. Arndt
  • Drycleaning method using dipropylene glycol n-propyl ether
    Patent number: 7087094
    Abstract: A drycleaning method is disclosed. In the method, a composition that comprises dipropylene glycol n-propyl ether (DPnP) and is essentially free of siloxanes or polysulfonic acids is used. The composition contains at least about 80 wt. % DPnP and up to about 15 wt. % of water. The method enables superior stain removal while avoiding excessive fabric shrinkage or soil redeposition.
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: August 8, 2006
    Assignee: Lyondell Chemical Technology, L.P.
    Inventors: Paul E. Galick, Larry W. Arndt, Shao-Hua Guo, Ellen S. Lenz, David R. Kinney