Patents by Inventor Rodney Lee Cravey

Rodney Lee Cravey 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).

  • Polymeric imides as pour point depressant additives for oil compositions
    Patent number: 9663740
    Abstract: The present invention generally relates to oil compositions, primarily to fuel oil and petroleum compositions produced there from susceptible to wax formation at low temperatures, to polymeric imides for use with such fuel oil compositions, and to methods for their manufacture.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: May 30, 2017
    Assignee: AKZO NOBEL N.V.
    Inventors: Stephen L. Mead, Rodney Lee Cravey, Mohammad Abdur Rahman
  • Pour point depressant additives for oil compositions
    Patent number: 7942941
    Abstract: The present invention generally relates to oil compositions, primarily to fuel oil and petroleum compositions produced there from susceptible to wax formation at low temperatures, to polymeric amides for use with such fuel oil compositions, and to methods for their manufacture.
    Type: Grant
    Filed: April 5, 2005
    Date of Patent: May 17, 2011
    Assignee: Akzo Nobel N.V.
    Inventors: Rodney Lee Cravey, Stephen L. Mead
  • Citric acid based emulsifiers for oilfield applications exhibiting low fluorescence
    Patent number: 7691960
    Abstract: The present invention relates to a composition of citric acid based emulsifiers comprising polyamides for oilfield drilling applications that exhibit very low fluorescence, and to a process for their preparation.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: April 6, 2010
    Assignee: Akzo Nobel N.V.
    Inventor: Rodney Lee Cravey