Patents by Inventor John Lee Dawkins

John Lee Dawkins 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).

  • Patent number: 10787403
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Grant
    Filed: December 5, 2019
    Date of Patent: September 29, 2020
    Assignee: Occidental Chemical Corporation
    Inventors: Richard L. Wilson, Rodney L. Klausmeyer, John Lee Dawkins, Daniel D. Rohrback, James S. Strathe, Lloyd B. Branam
  • Publication number: 20200109097
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Application
    Filed: December 5, 2019
    Publication date: April 9, 2020
    Inventors: Richard L. WILSON, Rodney L. KLAUSMEYER, John Lee DAWKINS, Daniel D. ROHRBACK, James S. STRATHE, Lloyd B. BRANAM
  • Patent number: 10526261
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: January 7, 2020
    Assignee: Occidental Chemical Corporation
    Inventors: Richard L. Wilson, Rodney L. Klausmeyer, John Lee Dawkins, Daniel D. Rohrback, James S. Strathe, Lloyd B. Branam
  • Patent number: 10207970
    Abstract: Processes for isolating 1,1,1,2,3-pentachloropropane from a crude product stream containing the 1,1,1,2,3-pentachloropropane and ferric chloride. The processes may include deep distillation of the crude, treatment of the crude with a reagent that deactivates the ferric chloride followed by distillation on the deactivated crude stream, aqueous washing of the crude product stream to remove ferric chloride followed by distillation on the deactivated crude stream. Other embodiments simultaneously prepare 1,1,2,3-tetrachloroprene and 1,1,1,2,3-pentachloroprane.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: February 19, 2019
    Assignee: Occidental Chemical Corporation
    Inventors: John Lee Dawkins, Darrell G Hollis, Rodney L Klausmeyer, Keith S Kramer, Michael A Garmon
  • Publication number: 20180265438
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Application
    Filed: May 16, 2018
    Publication date: September 20, 2018
    Inventors: Richard L. WILSON, Rodney L. KLAUSMEYER, John Lee DAWKINS, Daniel D. ROHRBACK, James S. STRATHE, Lloyd B. BRANAM
  • Patent number: 9981892
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: May 29, 2018
    Assignee: OCCIDENTAL CHEMICAL CORPORATION
    Inventors: Richard L. Wilson, Rodney L. Klausmeyer, John Lee Dawkins, Daniel D. Rohrback, James S. Strathe, Lloyd B. Branam
  • Publication number: 20170226033
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Application
    Filed: April 21, 2017
    Publication date: August 10, 2017
    Inventors: Richard L. WILSON, Rodney L. KLAUSMEYER, John Lee DAWKINS, Daniel D. ROHRBACK, James S. STRATHE, Lloyd B. BRANAM
  • Publication number: 20170174590
    Abstract: Processes for isolating 1,1,1,2,3-pentachloropropane from a crude product stream containing the 1,1,1,2,3-pentachloropropane and ferric chloride. The processes may include deep distillation of the crude, treatment of the crude with a reagent that deactivates the ferric chloride followed by distillation on the deactivated crude stream, aqueous washing of the crude product stream to remove ferric chloride followed by distillation on the deactivated crude stream. Other embodiments simultaneously prepare 1,1,2,3-tetrachloroprene and 1,1,1,2,3-pentachloroprane.
    Type: Application
    Filed: March 3, 2017
    Publication date: June 22, 2017
    Applicant: OCCIDENTAL CHEMICAL CORPORATION
    Inventors: John Lee DAWKINS, Darrell G HOLLIS, Rodney L KLAUSMEYER, Keith S KRAMER, Michael A GARMON
  • Patent number: 9650319
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: May 16, 2017
    Assignee: OCCIDENTAL CHEMICAL CORPORATION
    Inventors: Richard L. Wilson, Rodney L. Klausmeyer, John Lee Dawkins, Daniel D. Rohrback, James S. Strathe, Lloyd B. Branam
  • Patent number: 9598337
    Abstract: Processes for isolating 1,1,1,2,3-pentachloropropane from a crude product stream containing the 1,1,1,2,3-pentachloropropane and ferric chloride. The processes may include deep distillation of the crude, treatment of the crude with a reagent that deactivates the ferric chloride followed by distillation on the deactivated crude stream, aqueous washing of the crude product stream to remove ferric chloride followed by distillation on the deactivated crude stream. Other embodiments simultaneously prepare 1,1,2,3-tetrachloroprene and 1,1,1,2,3-pentachloroprane.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: March 21, 2017
    Assignee: OCCIDENTAL CHEMICAL CORPORATION
    Inventors: John Lee Dawkins, Darrell Gene Hollis, Rodney L. Klausmeyer, Keith S. Kramer, Michael Andrew Garmon
  • Patent number: 9586877
    Abstract: Processes for isolating 1,1,1,2,3-pentachloropropane from a crude product stream containing the 1,1,1,2,3-pentachloropropane and ferric chloride. The processes may include deep distillation of the crude, treatment of the crude with a reagent that deactivates the ferric chloride followed by distillation on the deactivated crude stream, aqueous washing of the crude product stream to remove ferric chloride followed by distillation on the deactivated crude stream. Other embodiments simultaneously prepare 1,1,2,3-tetrachloroprene and 1,1,1,2,3-pentachloroprane.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: March 7, 2017
    Assignee: OCCIDENTAL CHEMICAL CORPORATION
    Inventors: John Lee Dawkins, Darrell Gene Hollis, Rodney L. Klausmeyer, Keith S. Kramer, Michael Andrew Garmon
  • Publication number: 20150376094
    Abstract: Processes for isolating 1,1,1,2,3-pentachloropropane from a crude product stream containing the 1,1,1,2,3-pentachloropropane and ferric chloride. The processes may include deep distillation of the crude, treatment of the crude with a reagent that deactivates the ferric chloride followed by distillation on the deactivated crude stream, aqueous washing of the crude product stream to remove ferric chloride followed by distillation on the deactivated crude stream. Other embodiments simultaneously prepare 1,1,2,3-tetrachloroprene and 1,1,1,2,3-pentachloroprane.
    Type: Application
    Filed: February 12, 2014
    Publication date: December 31, 2015
    Inventors: John Lee DAWKINS, Darrell Gene HOLLIS, Rodney L. KLAUSMEYER, Keith S. KRAMER, Michael Andrew GARMON
  • Publication number: 20150353451
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Application
    Filed: August 17, 2015
    Publication date: December 10, 2015
    Inventors: Richard L. WILSON, Rodney L. KLAUSMEYER, John Lee DAWKINS, Daniel D. ROHRBACK, James S. STRATHE, Lloyd B. BRANAM
  • Publication number: 20150266799
    Abstract: Processes for isolating 1,1,1,2,3-pentachloropropane from a crude product stream containing the 1,1,1,2,3-pentachloropropane and ferric chloride. The processes may include deep distillation of the crude, treatment of the crude with a reagent that deactivates the ferric chloride followed by distillation on the deactivated crude stream, aqueous washing of the crude product stream to remove ferric chloride followed by distillation on the deactivated crude stream. Other embodiments simultaneously prepare 1,1,2,3-tetrachloroprene and 1,1,1,2,3-pentachloroprane.
    Type: Application
    Filed: June 4, 2015
    Publication date: September 24, 2015
    Inventors: John Lee DAWKINS, Darrell Gene HOLLIS, Rodney L. KLAUSMEYER, Keith S. KRAMER, Michael Andrew GARMON
  • Patent number: 9139495
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: September 22, 2015
    Assignee: Occidental Chemical Corporation
    Inventors: Richard L. Wilson, Rodney L. Klausmeyer, John Lee Dawkins, Daniel D. Rohrback, James S. Strathe, Lloyd B. Branam
  • Patent number: 9067858
    Abstract: Processes for isolating 1,1,1,2,3-pentachloropropane from a crude product stream containing the 1,1,1,2,3-pentachloropropane and ferric chloride. The processes may include deep distillation of the crude, treatment of the crude with a reagent that deactivates the ferric chloride followed by distillation on the deactivated crude stream, aqueous washing of the crude product stream to remove ferric chloride followed by distillation on the deactivated crude stream. Other embodiments simultaneously prepare 1,1,2,3-tetrachloroprene and 1,1,1,2,3-pentachloroprane.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 30, 2015
    Assignee: Occidental Chemical Corporation
    Inventors: John Lee Dawkins, Darrell Gene Hollis, Rodney L. Klausmeyer, Keith S. Kramer, Michael Andrew Garmon
  • Publication number: 20150087870
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Application
    Filed: November 26, 2014
    Publication date: March 26, 2015
    Inventors: Richard L. WILSON, Rodney L. KLAUSMEYER, John Lee DAWKINS, Daniel D. ROHRBACK, James S. STRATHE, Lloyd B. BRANAM
  • Patent number: 8912372
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: December 16, 2014
    Assignee: Occidental Chemical Corporation
    Inventors: Richard L. Wilson, Rodney L. Klausmeyer, John Lee Dawkins, Daniel D. Rohrback, James S. Strathe, Lloyd B. Branam
  • Publication number: 20140081056
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 20, 2014
    Applicant: OCCIDENTAL CHEMICAL CORPORATION
    Inventors: Richard L. WILSON, Rodney L. KLAUSMEYER, John Lee DAWKINS, Daniel D. ROHRBACK, James S. STRATHE, Lloyd B. BRANAM
  • Patent number: 8614363
    Abstract: Methods for the manufacture of 1,1,1,2,3-pentachloropropane from 1,1,1,3-tetrachloropropane and chlorine are disclosed. Improved methods are provided for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,2,3-pentachloropropane. Methods are also disclosed for the manufacture of 1,1,2,3-tetrachloropropene from 1,1,1,3-tetrachloropropane and chlorine and for the manufacture of 1,1,2,3-tetrachloropropene from carbon tetrachloride, ethylene, and chlorine.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: December 24, 2013
    Assignee: Occidental Chemical Corporation
    Inventors: Richard L. Wilson, Rodney L. Klausmeyer, John Lee Dawkins, Daniel D. Rohrback, James S. Strathe, Lloyd B. Branam