Patents by Inventor Daniel T. Plummer

Daniel T. Plummer 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).

  • Wellbore fluids and method of use
    Patent number: 10227519
    Abstract: A base fluid for formulating wellbore fluids. The base fluid comprises a mixture of synthetic aliphatic hydrocarbons derived from a Fischer-Tropsch product stream and contains greater than 96% aliphatic hydrocarbons having a carbon number range of from C6 to C30. The percentage of homologues having a carbon number of C10 or less is less than about 3 wt %.
    Type: Grant
    Filed: September 24, 2013
    Date of Patent: March 12, 2019
    Assignee: Sasol Performance Chemicals GmbH
    Inventors: Daniel T. Plummer, Christian Jones, Jorge M. Fernandez
  • Aliphatic polycarbonate-based surface active agents
    Patent number: 10011758
    Abstract: The present invention encompasses surface active agents useful in liquid or supercritical CO2 applications. The surface active agents comprise compounds containing a hydrocarbon segment and an aliphatic polycarbonate segment: The invention also provides methods of making the surface active agents and of using them in supercritical CO2 applications.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: July 3, 2018
    Assignees: Sasol Chemicals (USA) LLC, Novomer, Inc.
    Inventors: Kurt McWilliams, Daniel T. Plummer, Kip D. Sharp, Scott D. Allen, Christopher Simoneau
  • Aliphatic Polycarbonate-Based Surface Active Agents
    Publication number: 20160200962
    Abstract: The present invention encompasses surface active agents useful in liquid or supercritical CO2 applications. The surface active agents comprise compounds containing a hydrocarbon segment and an aliphatic polycarbonate segment: The invention also provides methods of making the surface active agents and of using them in supercritical CO2 applications.
    Type: Application
    Filed: August 26, 2014
    Publication date: July 14, 2016
    Inventors: Kurt McWilliams, Daniel T. Plummer, Kip D. Sharp, Scott D. Allen, Christopher Sinomeau
  • Wellbore Fluids and Method of Use
    Publication number: 20150225637
    Abstract: A base fluid for formulating wellbore fluids. The base fluid comprises a mixture of synthetic aliphatic hydrocarbons derived from a Fischer-Tropsch product stream and contains greater than 96% aliphatic hydrocarbons having a carbon number range of from C6 to C30. The percentage of homologues having a carbon number of C10 or less is less than about 3 wt %.
    Type: Application
    Filed: September 24, 2013
    Publication date: August 13, 2015
    Inventors: Daniel T. Plummer, Christian Jones, Jorge M. Fernandez
  • Method for making modified boehmite alumina
    Patent number: 6224846
    Abstract: A process for making a modified boehmite alumina comprising reacting at elevated temperatures a boehmite alumina with a compound having the formula: X(SO3M)n wherein X is an organic moiety, M in a monovalent cation, and n is an integer reflecting the number of SO3M groups bonded to said organic moiety to produce a reaction mixture containing modified boehmite alumina and recovering solid, modified boehmite alumina from the reaction mixture.
    Type: Grant
    Filed: August 21, 1999
    Date of Patent: May 1, 2001
    Assignee: Condea Vista Company
    Inventors: Paul K. Hurlburt, Daniel T. Plummer
  • Surfactant compositions and method therefor
    Patent number: 4765926
    Abstract: A surfactant composition comprising from about 30 to about 50% by weight of a sulfated alkoxylated alcohol, an effective amount of an alkyl aryl sulfonate and an effective amount of a water soluble salt of a divalent acid, the composition being flowable or pumpable at normal handling temperatures.
    Type: Grant
    Filed: March 18, 1986
    Date of Patent: August 23, 1988
    Assignee: Vista Chemical Company
    Inventor: Daniel T. Plummer
  • Method of treating alumina to increase slurry life
    Patent number: 4746503
    Abstract: A process for treating dry, particulate alumina for use in preparing alumina slurries which are resistant to gellation in which the particulate alumina is contacted with a carbon dioxide rich gaseous medium for a suitable time.
    Type: Grant
    Filed: October 9, 1986
    Date of Patent: May 24, 1988
    Assignee: Vista Chemical Company
    Inventors: David A. Barclay, Daniel T. Plummer