Patents by Inventor Roger Paver

Roger Paver 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).

  • Bis-triazolyl and bis-pyrazolyl stilbene compounds
    Patent number: 4316815
    Abstract: The invention relates to stilbene derivatives which are used as optical brightening agents, particularly as anionic brightening agents for polyamide and cellulosic substrates. These stilbene derivatives have the formula I ##STR1## in which both X's are the same and are CR.sub.5 or N, where R.sub.5 is hydrogen, C.sub.1-4 alkyl or phenyl;both Y's are the same and are each one of the radicals of benzofuran, triazole, pyrazole, dibenzofuran or dibenzothiophene and benzothiophene, andR.sub.1 is as defined in the specification.
    Type: Grant
    Filed: November 12, 1980
    Date of Patent: February 23, 1982
    Assignee: Sandoz Ltd.
    Inventors: Alec V. Mercer, Roger Paver
  • Triazolyl stilbene triazoles
    Patent number: 4167626
    Abstract: Disclosed are compounds of formula I, ##STR1## in which X signifies hydrogen, C.sub.1-4 alkyl, cyano, --COOM, --COOR.sub.1, --CONR.sub.2 R.sub.3, --SO.sub.2 NR.sub.2 R.sub.3, --SO.sub.2 R.sub.1, --SOR.sub.1, --SO.sub.3 R.sub.1 or --SO.sub.3 M,Y signifies hydrogen, C.sub.1-4 alkyl, cyano, --COOM, --COOR.sub.1, --CONR.sub.2 R.sub.3, --SO.sub.2 NR.sub.2 R.sub.3, --SO.sub.2 R.sub.1, --SOR.sub.1, --SO.sub.3 R.sub.1 or --SO.sub.3 M, with the proviso that X and Y do not simultaneously have a significance selected from hydrogen and C.sub.1-4 alkyl,R signifies an aryl radical, unsubstituted or substituted by up to two substituents selected from C.sub.1-4 alkyl, C.sub.1-4 alkoxy, chlorine, cyano, --COOM, --COOR.sub.1, --CONR.sub.4 R.sub.5, --SO.sub.2 NR.sub.4 R.sub.5, --SO.sub.2 R.sub.1 and --SO.sub.3 M,R.sub.1 signifies C.sub.1-4 alkyl or phenyl,R.sub.2 and R.sub.3, independently, signify hydrogen or C.sub.1-4 alkyl, either R.sub.4 and R.sub.5, independently, signify hydrogen or C.sub.1-4 alkyl,Or R.sub.4 and R.sub.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: September 11, 1979
    Assignee: Sandoz Ltd.
    Inventors: Fritz Fleck, Alec V. Mercer, Roger Paver