Patents by Inventor Chil Y. Choi

Chil Y. Choi 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).

  • Recovery of phosphorus values and salt impurities from aqueous waste streams
    Patent number: 9394173
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: July 19, 2016
    Assignee: Monsanto Technology LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld, Fuchen Liu, Chen-Hsyong Yang
  • RECOVERY OF PHOSPHORUS VALUES AND SALT IMPURITIES FROM AQUEOUS WASTE STREAMS
    Publication number: 20140234196
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Application
    Filed: January 21, 2014
    Publication date: August 21, 2014
    Applicant: Monsanto Technology LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld, Fuchen Liu, Chen-Hsyong Yang
  • Recovery of phosphorus values and salt impurities from aqueous waste streams
    Patent number: 8669396
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: March 11, 2014
    Assignee: Monsanto Technology LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld
  • RECOVERY OF PHOSPHORUS VALUES AND SALT IMPURITIES FROM AQUEOUS WASTE STREAMS
    Publication number: 20120100051
    Abstract: The present invention generally relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams. In particular, the present invention relates to processes for recovery of phosphorus values and salt impurities from aqueous waste streams generated in the manufacture of phospho-herbicides, including N-(phosphonomethyl)glycine and glufosinate.
    Type: Application
    Filed: May 13, 2010
    Publication date: April 26, 2012
    Applicant: MONSANTO TECHNOLOGY LLC
    Inventors: Chil Y. Choi, Gregory A. Hartmann, Peng Lei, Fuchen Liu, William Poncez, Peter E. Rogers, William A. Scholle, Lowell Smith, Robert B. Weisenfeld, Chen-Hsyong Yang