Patents by Inventor Patricia A. Levenberg

Patricia A. Levenberg 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 producing 3-(2-chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethylcyclopropanecarboxyl ates
    Patent number: H49
    Abstract: Disclosed is a Wittig-type process for preparing 3-(2-chloro-3,3,3-trifluoropropenyl)-2,2-dimethylcyclopropanecarboxylates which comprises reacting 1,1,1-trichlorotrifluoroethane with hexamethylphosphorous triamide at a temperature in the range of about -80.degree. C. to 10.degree. C. in the presence of an inert aprotic solvent and a carbonaldehyde ester, and thereafter maintaining the reaction mixture at a temperature in the range of about 0.degree. C. to 30.degree. C. Also disclosed are the novel caronaldehyde ester (2-methyl[1,1'-biphenyl]-3-yl)methyl 2,2-dimethyl-3-formylcyclopropanecarboxylate and a precursor compound, (2-methyl[1,1'-biphenyl]-3-yl)methyl 2,2-dimethyl-3-(1,2-epoxy-2-methylpropyl)cyclopropanecarboxylate, and methods for producing them.
    Type: Grant
    Filed: January 10, 1983
    Date of Patent: April 1, 1986
    Assignee: FMC Corporation
    Inventor: Patricia A. Levenberg