Patents by Inventor Charles Walter Ellwood

Charles Walter Ellwood 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 diketone compounds and precursors thereto
    Patent number: 6696613
    Abstract: A process for preparing compounds of the formula: wherein R2 is lower alkyl; or phenyl optionally substituted by from one to five groups, the same or different, which are lower alkyl, lower haloalkyl, halogen or —SR4; R3 is halogen, lower alkyl, lower haloalkyl, lower alkoxy, lower haloalkoxy, —S-alkyl, cycloalkyl having from 3 to 7 carbon atoms in the ring, alkenyl or alkynyl having from 3 to 7 carbon atoms, or —(CR5R6)—SR2 wherein q is one or two; R4 is lower alkyl; R5 and R6 independently represent hydrogen, lower alkyl or lower haloalkyl; and n is zero or an integer from one to three; intermediate compounds of the formula: and processes for preparing them.
    Type: Grant
    Filed: December 31, 2002
    Date of Patent: February 24, 2004
    Assignee: Rhone Poulenc Agrochimie
    Inventors: Virginie Pevere, Alain Gadras, Susan Mary Cramp, Charles Walter Ellwood
  • Process for preparing diketone compounds and precursors thereto
    Publication number: 20030097022
    Abstract: A process for preparing compounds of the formula: 1
    Type: Application
    Filed: December 31, 2002
    Publication date: May 22, 2003
    Inventors: Virginie Pevere, Alain Gadras, Susan Mary Cramp, Charles Walter Ellwood
  • Process for preparing diketone compounds and precursors thereto
    Patent number: 6525225
    Abstract: A process for preparing compounds of the formula: wherein R2 is lower alkyl; or phenyl optionally substituted by from one to five groups, the same or different, which are lower alkyl, lower haloalkyl, halogen or —SR4; R3 is halogen, lower alkyl, lower haloalkyl, lower alkoxy, lower haloalkoxy, —S-alkyl, cycloalkyl having from 3 to 7 carbon atoms in the ring, alkenyl or alkynyl having from 3 to 7 carbon atoms, or —(CR5R6)—SR2 wherein q is one or two; R4 is lower alkyl; R5 and R6 independently represent hydrogen, lower alkyl or lower haloalkyl; and n is zero or an integer from one to three; intermediate compounds of the formula: and processes for preparing them.
    Type: Grant
    Filed: November 23, 2001
    Date of Patent: February 25, 2003
    Assignee: Rhone Poulenc Agrochimie
    Inventors: Virginie Pevere, Alain Gadras, Susan Mary Cramp, Charles Walter Ellwood
  • Process for preparing diketone compounds and precursors thereto
    Publication number: 20020062045
    Abstract: A process for preparing compounds of the formula: 1
    Type: Application
    Filed: November 23, 2001
    Publication date: May 23, 2002
    Inventors: Virginie Pevere, Alain Gadras, Susan Mary Cramp, Charles Walter Ellwood
  • Process for preparing diketone compounds and precursors thereto
    Publication number: 20010014761
    Abstract: A process for preparing compounds of the formula: 1
    Type: Application
    Filed: March 20, 2001
    Publication date: August 16, 2001
    Inventors: Virginie Pevere, Alain Gadras, Susan Mary Cramp, Charles Walter Ellwood
  • Process for preparing diketone compounds
    Patent number: 6235942
    Abstract: A process for preparing compounds of the formula: wherein R2 is lower alkyl; or phenyl optionally substituted by from one to five groups, the same or different, which are lower alkyl, lower haloalkyl, halogen or —SR4; R3 is halogen, lower alkyl, lower haloalkyl, lower alkoxy, lower haloalkoxy, —S-alkyl, cycloalkyl having from 3 to 7 carbon atoms in the ring, alkenyl or alkynyl having from 3 to 7 carbon atoms, or -(CR5R6)—SR2 wherein q is one or two; R4 is lower alkyl; R5 and R6 independently represent hydrogen, lower alkyl or lower haloalkyl; and n is zero or an integer from one to three; intermediate compounds of the formula: and processes for preparing them.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: May 22, 2001
    Assignee: Rhone-Poulenc Agrochimie
    Inventors: Virginie Pevere, Alain Gadras, Susan Mary Cramp, Charles Walter Ellwood