Patents by Inventor Sarah May Crawford

Sarah May Crawford 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 to prepare 3-methyl-2-nitrobenzoic acid by air oxidation
    Patent number: 9828328
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above. wherein R1 is C1-C7 alkyl, C3-C6 cycloalkyl or C4-C7 alkylcycloalkyl.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: November 28, 2017
    Assignee: E I DU PONT DE NEMOURS AND COMPANY
    Inventors: Stephen Ernest Jacobson, Donald J. Dumas, Rupert Spence, Sarah May Crawford, Venkateswara Rao Surisetty
  • PROCESS TO PREPARE 3-METHYL-2-NITROBENZOIC ACID BY AIR OXIDATION
    Publication number: 20170197907
    Abstract: A method for preparing 3-methyl-2-nitrobenzoic acid is disclosed wherein 1,3-dimethyl-2-nitrobenzene is combined with an oxidation catalyst in the presence of an oxygen source and an initiator, provided that less than 99% of the 1,3-dimethyl-2-nitrobenzene is oxidized. A method for preparing compounds of Formula 7 and Formula 11 is also disclosed wherein the method is characterized by using 3-methyl-2-nitrobenzoic acid as prepared by the method disclosed above.
    Type: Application
    Filed: May 29, 2015
    Publication date: July 13, 2017
    Inventors: Stephen Ernest Jacobson, Donald J. Dumas, Rupert Spence, Sarah May Crawford, Venkateswara Rao Surisetty