Patents by Inventor Albert Percival

Albert Percival 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).

  • Fungicides
    Patent number: 4853400
    Abstract: Compounds of any one of formulae I-VII ##STR1## where is a single or double bond;A is oxygen or sulphurR.sup.1 is aryl;R.sup.2 is 1-imidazolyl or 1,2,4-triazol-1-yl andR.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, are each hydrogen, halo, alkyl or alkoxy, have fungicidal activity.
    Type: Grant
    Filed: May 16, 1988
    Date of Patent: August 1, 1989
    Assignee: Schering Agrochemicals Limited
    Inventors: John H. Parsons, Russell G. Hunt, Susan E. Leach, Anthony D. Buss, David E. Green, Michael Mellor, Albert Percival
  • Fungicidal azole compounds
    Patent number: 4824469
    Abstract: Compounds of the formula: ##STR1## where: A is oxygen or sulphur;R.sup.1 is phenyl or substituted phenyl in which the substituent is at least one member selected from the group consisting of halogen, C.sub.1-6 -alkyl, C.sub.1-6 -haloalkyl, C.sub.1-6 -alkoxy, C.sub.1-6 -haloalkoxy and nitro;R.sup.2 is 1-imidazolyl or 1,2,4-triazol-1-yl; andR.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, are each hydrogen, halo, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy have valuable fungicidal properties.
    Type: Grant
    Filed: March 11, 1988
    Date of Patent: April 25, 1989
    Assignee: Schering Agrochemicals Ltd.
    Inventors: David E. Green, Albert Percival
  • Fungicides
    Patent number: 4772613
    Abstract: Compounds of any of one of formulae I-VII ##STR1## where is a single or double bond;A is oxygen or sulphur;R.sup.1 is aryl;R.sup.2 is 1-imidazolyl or 1,2,4-triazol-1-yl; andR.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, are each hydrogen, halo, alkyl or alkoxy, have fungicidal activity.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: September 20, 1988
    Assignee: Schering Agrochemicals Ltd.
    Inventors: John H. Parsons, Russell G. Hunt, Susan E. Leach, Anthony D. Buss, David E. Green, Michael Mellor, Albert Percival
  • Fungicidal azole compounds
    Patent number: 4731106
    Abstract: Compounds of the formula: ##STR1## where: A is oxygen or sulphur;R.sup.1 is phenyl or substituted phenyl in which the substituent is at least one member selected from the group consisting of halogen, C.sub.1-6 -alkyl, C.sub.1-6 -haloalkyl, C.sub.1-6 -alkoxy, C.sub.1-6 -haloalkoxy and nitro;R.sup.2 is 1-imidazoly of 1,2,4-triazol-1-yl; andR.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, are each hydrogen, halo, C.sub.1-6 -alkyl or C.sub.1-6 -alkoxy have valuable fungicidal properties.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: March 15, 1988
    Assignee: Schering Agrochemicals Limited
    Inventors: David E. Green, Albert Percival
  • 2-Cyano-3-benzylamino-2-propenoates, useful as fungicides
    Patent number: 4508659
    Abstract: Fungicidal compositions comprise a compound of formula I ##STR1## in which R.sup.1 and R.sup.3 are hydrogen, alkyl or alkenyl;R.sup.2 is alkyl optionally substituted by a 5 or 6 membered oxygen containing ring or by phenyl (optionally substituted) and one of R.sup.4 and R.sup.5 is--CN and the other is a carboxylic ester or amide group. Many of the compounds are novel.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: April 2, 1985
    Assignee: FBC Limited
    Inventors: Graham P. Rowson, Albert Percival, Philip N. Judson
  • Compounds useful as pesticides
    Patent number: 4349378
    Abstract: Sulphonanilides of formula ##STR1## and salts thereof, wherein R.sup.1 represents alkyl or certain other groups;R represents alkylene or alkenylene;A represents --COR.sup.12 or a carbonyl derivative or addition compound thereof, where R.sup.12 represents hydrogen, alkyl or certain other groups; andR.sup.2 -R.sup.6 represent hydrogen, alkyl, halogen or certain other groups;are pesticides and plant growth regulants, especially herbicides and fungicides.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: September 14, 1982
    Assignee: FBC Limited
    Inventors: Geoffrey R. Cliff, Russell G. Hunt, Albert Percival
  • Substituted pyrazolopyrimidine compounds
    Patent number: 4163846
    Abstract: There are provided, as novel herbicides, the substituted pyrazolopyrimidines of the formula: ##STR1## where A represents -CO-NR.sup.6 - or -C(OR.sup.7).dbd.N-, and R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.6 and R.sup.7 are substituent groups as defined in the specification, and the salts and acid addition salts thereof. Processes for their preparation are provided, as also are herbicidal compositions containing them and methods of combating weeds in which they are used.
    Type: Grant
    Filed: May 13, 1977
    Date of Patent: August 7, 1979
    Assignee: Fisons Limited
    Inventors: Albert Percival, Philip N. Judson
  • Bis-amide fungicidal compounds
    Patent number: 4146646
    Abstract: Bis-amides of formula ##STR1## and salts thereof, where R.sup.2 and R.sup.3 are hydrogen; alkyl of up to 9 carbon atoms, alkenyl or alkynyl of up to 4 carbon atoms, or aryl, groups optionally substituted by certain radicals; or cycloalkyl of 3-7 carbon atoms; and R.sup.1 and R.sup.4 are as R.sup.2 and R.sup.3 or amino groups optionally substituted by certain radicals, are fungicides, especially against soil borne fungal diseases of plants.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: March 27, 1979
    Assignee: Fisons Limited
    Inventors: Albert Percival, Peter J. Burton
  • Halogenated alkylsulphonyl-benzimidazoles
    Patent number: 4109004
    Abstract: There are provided substituted benzimidazoles of the formula: ##STR1## (wherein at least two of the radicals X are halogen and the remainder are hydrogen, and R represents an alkyl radical of 1 to 6 carbon atoms), processes for preparing them, and compositions containing them.The compounds possess anti-protozoal activity.
    Type: Grant
    Filed: August 22, 1977
    Date of Patent: August 22, 1978
    Assignee: Fisons Limited
    Inventor: Albert Percival
  • Benzimidazole sulphonyl chlorides
    Patent number: 3940416
    Abstract: 2-Trifluoromethylbenzimidazoles having a sulphamoyl or substituted sulphamoyl substituent on the benzene ring combat mammalian parasites, for example liver fluke in mammals e.g. sheep, and cattle tick and sheep blowfly.
    Type: Grant
    Filed: April 30, 1974
    Date of Patent: February 24, 1976
    Assignee: Fisons Ltd.
    Inventors: John Roger Corbett, Albert Percival