Patents by Inventor Thomas Mark Weaver

Thomas Mark Weaver 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).

  • Synthesis of amino acid, N-carboxyanhydrides
    Patent number: 7294719
    Abstract: A process for producing N-carboxyanhydrides is disclosed. The process produces N-carboxyanhydrides as a product and HCl as a by-product. The HCl by-product is purged from the reaction mixture by passing a purge gas through the reaction mixture as a carbonylation reagent is reacting with an amino acid or a salt thereof. The N-carboxyanhydrides produced by this process have a relatively lower chloride impurity content, relatively higher yields can be achieved, and the N-carboxyanhydrides can be produced on a larger scale.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: November 13, 2007
    Assignee: Sigma-Aldrich Co.
    Inventors: John Michael Carubia, Thomas Mark Weaver, Ettigounder Ponnusamy