Patents by Inventor Russell Martin Ellis

Russell Martin Ellis 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).

  • Triazole phosphonic acid derivatives and their use as herbicides
    Patent number: 5922644
    Abstract: A herbicidal compound of formula (I) ##STR1## or a salt, tautomer or cyclic derivative thereof; where R.sup.1 and R.sup.2 are hydrogen and A is an optionally substituted saturated or unsaturated chain or ring of three carbon atoms.Methods for preparing these compounds, intermediates used in the preparation and herbicidal compositions containing them are also described and claimed.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: July 13, 1999
    Assignee: Zeneca Limited
    Inventors: John Michael Cox, Peter Bellini, Roger Barrett, Russell Martin Ellis, Timothy Robert Hawkes
  • Process for preparing pyrrolidinones
    Patent number: 5670656
    Abstract: A process for the preparation of a compound of general formula II: ##STR1## wherein R.sup.1 is hydrogen, or C.sub.1 -C.sub.10 hydrocarbyl or heterocyclyl having 3 to 8 ring atoms, either of which may optionally be substituted; each R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is independently hydrogen or C.sub.1 -C.sub.4 alkyl; A is an optionally substituted aromatic or heteroaromatic ring system; and R.sup.21 is hydrogen, halogen, OH or OCONHR.sup.1, wherein R.sup.1 is as defined above; the process comprising cyclizing a compound of general formula III: ##STR2## wherein A, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.21 are as defined in general formula II and R.sup.25 is a leaving group such as a halogen atom; under basic conditions.
    Type: Grant
    Filed: May 24, 1996
    Date of Patent: September 23, 1997
    Assignee: Zeneca Limited
    Inventors: John Michael Cox, Kevin James Gillen, Russell Martin Ellis, Shaheen Khatoon Vohra, Stephen Christopher Smith, Ian Richard Matthews