Patents by Inventor Constance A. Fellows

Constance A. Fellows 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 for preparing 2-methyl-2-(methylthio) propionaldehyde O-(methylcarbamoyl) oxime as a water-wet cake
    Patent number: 4886913
    Abstract: This invention relates to a process for preparing 2-methyl-2-(methylthio) propionaldehyde O-(methylcarbamoyl) oxime as an aqueous wet cake by reacting 2-methyl-2-(methylthio) propionaldehyde oxime with methyl isocyanate in the presence of an aqueous medium. This invention also relates to an aqueous wet cake composition containing 2-methyl-2-(methylthio) propionaldehyde O-(methylcarbamoyl) oxime.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: December 12, 1989
    Assignee: Rhone-Poulenc Nederland, B.V.
    Inventors: Constance A. Fellows, Patrick G. Hecht, Steven B. Levin
  • Process for preparing 2-methyl-2-(methylsulfonyl) propionaldehyde O-(methylcarbamoyl) oxime as a water-wet cake
    Patent number: 4847413
    Abstract: This invention relates to a process for preparing 2-methyl-2-(methylsulfonyl) propionaldehyde O-(methylcarbamoyl) oxime as an aqueous wet cake by reacting 2-methyl-2-(methylthio) propionaldehyde oxime with methyl isocyanate in an aqueous medium to give 2-methyl-2-(methylthio) propionaldehyde O-(methylcarbamoyl) oxime which is then oxidized in an aqueous medium to give 2-methyl-2-(methylsulfonyl) propionaldehyde O-(methylcarbamoyl) oxime. This invention also relates to an aqueous wet cake composition containing 2-methyl-2-(methylsulfonyl) propionaldehyde O-(methylcarbamoyl) oxime.
    Type: Grant
    Filed: June 27, 1986
    Date of Patent: July 11, 1989
    Assignee: Rhone-Poulenc Nederland, B.V.
    Inventor: Constance A. Fellows
  • Intermediate, its synthesis, and its use in a process for the preparation of 2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran
    Patent number: 4639536
    Abstract: 2,3-Dihydro-2,2-dimethyl-7-hydroxybenzofuran is prepared by reacting catechol with isobutylene oxide or with a compound having the general formula ##STR1## wherein R is halogen or hydroxyl, and X is halogen, in the presence of a base to form the intermediate 2-(2-hydroxy-2-methylpropoxy) phenol and then thermally dehydrating, rearranging and cyclizing the resulting intermediate phenol in the presence of an acid catalyst to form 2,3-dihydro-2,2-dimethyl-7-hydroxybenzofuran.
    Type: Grant
    Filed: August 30, 1984
    Date of Patent: January 27, 1987
    Assignee: Union Carbide Corporation
    Inventors: Constance A. Fellows, Wallace Y. Fu