Patents by Inventor David Cole DeCoster

David Cole DeCoster 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).

  • Lignin Derivatives
    Publication number: 20160229879
    Abstract: The present invention provides lignin derivatives having a certain physical and/or chemical properties. In particular, the lignin derivatives of the invention have particular NMR spectral characteristics, impurity content, average molecular weight, and/or other characteristics.
    Type: Application
    Filed: February 10, 2015
    Publication date: August 11, 2016
    Applicant: PUREVISION TECHNOLOGY, LLC
    Inventors: Dhrubojyoti Dey Laskar, John Allen Yegge, Andrew Stephen Boswell, Sara Jordan Chmelka, Leslie W. Joy, Ryan Carl Allen Tarrant, David Cole DeCoster, Richard C. Wingerson, Edwin R. Lehrburger
  • Methods for controlling the reaction rate of a hydrocarbon to an acid by making phase-related adjustments
    Patent number: 6288270
    Abstract: Methods for controlling the reaction rate of a hydrocarbon to an acid by making phase-related adjustments are disclosed. In order to improve reaction rate of the oxidation, a single phase at the operating temperature is attained and maintained by adjusting one or more of gaseous oxidant flow rate, pressure in the reaction zone, temperature in the reaction zone, feed rate of hydrocarbon, feed rate of solvent, feed rate of water if water is being fed, feed rate of the catalyst. The preferred hydrocarbon is cyclohexane, the preferred acid is adipic acid, the preferred solvent is acetic acid, and the preferred catalyst is cobalt acetate. Other hydrocarbons include, but are not limited to, methylated benzene, methylated structures involving two benzene rings, and methylated naphthalene.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: September 11, 2001
    Assignee: RPC Inc.
    Inventors: Mark William Dassel, Eustathios Vassiliou, David Cole DeCoster, Ader Meherban Rostami, Sharon Marie Aldrich
  • Methods for preparing polymers from dibasic acids
    Patent number: 6156868
    Abstract: This invention relates to methods of preparing dibasic acids, such as adipic acid for example, by oxidizing a hydrocarbon with a gas containing an oxidant, preferably oxygen. A respective hydrocarbon is reacted with a gaseous oxidant to form dibasic acid in a mixture which preferably contains a solvent, a catalyst, and an initiator. The temperature of the mixture is then lowered to a point at which solid dibasic acid is precipitated, while maintaining a single liquid phase. At least part of the formed acid is then removed.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: December 5, 2000
    Assignee: RPC Inc.
    Inventors: Mark William Dassel, David Cole DeCoster, Ader Meherban Rostami, Sharon Marie Aldrich, Eustathios Vassiliou
  • Methods for preparing dibasic acids
    Patent number: 5922908
    Abstract: This invention relates to methods of preparing dibasic acids, such as adipic acid for example, by oxidizing a hydrocarbon with a gas containing an oxidant, preferably oxygen. A respective hydrocarbon is reacted with a gaseous oxidant to form dibasic acid in a mixture which preferably contains a solvent, a catalyst, and an initiator. The temperature of the mixture is then lowered to a point at which solid dibasic acid is precipitated, while maintaining a single liquid phase. At least part of the formed acid is then removed.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: July 13, 1999
    Assignee: Twenty-First Century Research Corporation
    Inventors: Mark William Dassel, David Cole DeCoster, Ader Meherban Rostami, Sharon Marie Aldrich, Eustathios Vassiliou