Patents by Inventor Charles R. Nease

Charles R. Nease 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).

  • Process of melt index control
    Patent number: 8809472
    Abstract: A method comprising contacting an olefin in the presence of a catalyst and a melt index modifier (MIM) under conditions suitable to form a polyolefin and recovering the polyolefin, wherein the polyolefin melt index is increased by at least about 25%, wherein the normalized catalyst activity is decreased by less than about 10%, and wherein the MIM is characterized by the general formula R1—HC?CH—R2 or R3R4C?CH2 where R1, R2, R3, R4 are each selected from the group consisting of a non-aromatic organyl group.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: August 19, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Charles R. Nease, Max P. McDaniel
  • Continuous catalyst activator
    Patent number: 8790579
    Abstract: Methods and systems for preparing catalyst, such as chromium catalysts, are provided. The valence of at least a portion of the catalyst sent to an activator is changed from Cr(III) to Cr(VI). The catalyst is prepared or activated continuously using a fluidization bed catalyst activator.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: July 29, 2014
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Ted H. Cymbaluk, Charles K. Newsome, Charles R. Nease, H. Kenneth Staffin, Thomas R. Parr
  • Continuous catalyst activator
    Patent number: 8349264
    Abstract: Methods and systems for preparing catalyst, such as chromium catalysts, are provided. The valence of at least a portion of the catalyst sent to an activator is changed from Cr(III) to Cr(VI). The catalyst is prepared or activated continuously using a fluidization bed catalyst activator.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: January 8, 2013
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Ted H. Cymbaluk, Charles K. Newsome, Charles R. Nease, H. Kenneth Staffin, Thomas R. Parr
  • Continuous catalyst activator
    Patent number: 8114353
    Abstract: Methods and systems for preparing catalyst, such as chromium catalysts, are provided. The valence of at least a portion of the catalyst sent to an activator is changed from Cr(III) to Cr(VI). The catalyst is prepared or activated continuously using a fluidization bed catalyst activator.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: February 14, 2012
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Ted H. Cymbaluk, Charles K. Newsome, Charles R. Nease, H. Kenneth Staffin, Thomas R. Parr
  • Continuous catalyst activator
    Publication number: 20090164046
    Abstract: Methods and systems for preparing catalyst, such as chromium catalysts, are provided. The valence of at least a portion of the catalyst sent to an activator is changed from Cr(III) to Cr(VI). The catalyst is prepared or activated continuously using a fluidization bed catalyst activator.
    Type: Application
    Filed: December 20, 2007
    Publication date: June 25, 2009
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Elizabeth A. Benham, Max P. McDaniel, Ted H. Cymbaluk, Charles K. Newsome, Charles R. Nease, H. Kenneth Staffin, Thomas R. Parr
  • Ethylene polymerization processes and products thereof
    Patent number: 5866661
    Abstract: A process to control the heat transfer coefficient in slurry olefin polymerization processes comprising shocking the polymerization reactor is provided. This shock comprises quickly decreasing and then restoring to normal operating conditions, the higher alpha-olefin comonomer to ethylene monomer weight feed ratio.
    Type: Grant
    Filed: December 13, 1996
    Date of Patent: February 2, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Elizabeth A. Benham, Max P. McDaniel, John D. Stewart, Lonnie J. Dodson, Charles R. Nease
  • Ethylene homopolymer and copolymer polymerization process and the products produced therefrom
    Patent number: 5155186
    Abstract: A process has been discovered for the polymerization of ethylene and mixtures of ethylene with at least one other mono-1-olefin by employing a polymerization catalyst that produces polymers containing terminal vinyl unsaturation wherein such catalyst is exposed to a modifying agent prior to or during the polymerization reaction.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: October 13, 1992
    Assignee: Phillips Petroleum Company
    Inventors: John P. R. Hogan, Charles R. Nease