Patents by Inventor Libert C. Saunders

Libert C. Saunders 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).

  • Ethene derivatives
    Patent number: 4659727
    Abstract: Ethene derivatives of the formula:[R.sup.5 (R.sup.1 CR.sup.4 .dbd.CR.sup.2 R.sup.3).sub.m ].sub.n Iwherein R.sup.5 represents optionally substituted heterocyclyl or a group --CR.sup.4 .dbd.CR.sup.2 R.sup.3, or optionally substituted aryl, heterocyclylalkyl or arylalkyl and R.sup.1 represents --NR.sup.6 -- wherein R.sup.6 represents hydrogen or optionally substituted alkyl or aryl, or R.sup.5 represents a quinonoidal group, and R.sup.1 represents .dbd.N--, R.sup.4 represents hydrogen, alkoxy, alkylthio, trifluoromethyl or optionally substituted alkyl or aryl, R.sup.2 represents cyano, formyl, alkoxycarbonyl, alkylsulphonyl, dialkylcarbamoyl, dialkylthiocarbamoyl, aryloxycarbonyl, arylsulphinyl or arylsulphonyl, R.sup.3 represents a group R.sup.2 or hydrogen, nitro or optionally substituted aryl or aroyl or alkanoyl, and m and n are 1 or 2, and pharmaceutically acceptable salts thereof, with the exclusion of certain compounds in which R.sup.
    Type: Grant
    Filed: September 10, 1985
    Date of Patent: April 21, 1987
    Assignee: May & Baker Limited
    Inventors: Adnan H. Al-Shaar, Barbara J. Broughton, Robert K. Chambers, David W. Gilmour, Diane M. Kelsey, Peter Lowden, Edward Lunt, David J. Lythgoe, Ian McClenaghan, Duncan C. McDougall, Libert C. Saunders, Keith A. J. Stuttle, Peter J. Warne
  • Antiarthritic pyridylaminoethene disulfonyl compounds and use
    Patent number: 4647569
    Abstract: Pyridylaminoethene derivatives of the formula: ##STR1## wherein R.sup.1 is pyridyl, unsubstituted or substituted by one or more substituents R.sup.4 selected from halogen, amino, carboxy, cyano nitro, hydroxy, formyl, trifluoromethyl, aryl, aryloxy, arylthio, benzyloxycarbonylamino, sulphamoyl, tetrazol-5-yl, carbamoyl, thiocarbamoyl, arylcarbamoyl, aroyl, alkyl, alkoxy, alkylthio, alkylsulphonyl, alkylamino, alkylsulphamoyl, arylalkyl, alkanoyl, alkoxycarbonyl, alkoxycarbonylamino, alkylcarbamoyl, alkanoylamino, N-benzyloxycarbonyl-N-alkylamino, or dialkylsulphamoyl, dialkylamino or dialkylcarbamoyl, wherein the alkyl groups may together form a ring, and R.sup.2 and R.sup.3 each represents phenyl, unsubstituted or substituted by one or more substituents R.sup.4 as hereinbefore defined, possess antiarthritic properties.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: March 3, 1987
    Assignee: May & Baker Limited
    Inventors: Raymond F. Collins, Philip Knowles, Libert C. Saunders, Francis J. Tierney, Peter J. Warne
  • Treating arthritis with 3-(N,N-dimethyl carbamoyl)pyrazolo[1,5-a]pyridine
    Patent number: 4604400
    Abstract: 3-(N,N-Dimethylcarbamoyl)pyrazolo[1,5-a]pyridine of the formula: ##STR1## which is a new compound, possesses pharmacological properties, in particular properties which are indicative of outstanding utility in the treatment of arthritic disorders such as rheumatoid arthritis. The compound can be prepared by reacting a pyrazolo[1,5-a]pyridine-3-carbonyl halide (e.g. chloride) with dimethylamine.
    Type: Grant
    Filed: September 13, 1984
    Date of Patent: August 5, 1986
    Assignee: May & Baker Limited
    Inventors: Raymond F. Collins, Christopher A. Ramsden, Libert C. Saunders, Peter J. Warne