Patents by Inventor James William Ringer

James William Ringer 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).

  • Purification of n-(phosphonomethyl)glycine
    Patent number: 7683207
    Abstract: The present invention is a process for the purification of glyphosate (PMG) comprising: 1) dissolving or suspending a material comprising PMG in water, in the presence of a base, to produce a composition comprising a PMG salt in an aqueous base, 2) contacting the composition with an acid, such that the PMG salt is neutralized, forming a precipitate of PMG, and 3) isolating the precipitate of PMG, with the proviso that the composition of step 1) is not concentrated or filtered using a nanofiltration membrane.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: March 23, 2010
    Assignee: Dow AgroSciences LLC
    Inventors: Jimmy Jui Tai, Herbert Nathan Praay, James William Ringer, Mark Victor Michael Emonds