Patents by Inventor Brian E. Leggeter

Brian E. Leggeter 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).

  • Compositions for the optical whitening of organic materials and use thereof
    Patent number: 4216105
    Abstract: Compounds of the general formula R--CH.dbd.CH--W--CH.dbd.CH--R.sup.1 are described in which R and R.sup.1 are independently phenyl, diphenyl, naphthyl, indyl, tetrahydronaphthyl or acenaphthenyl and W is divalent phenyl, diphenyl, naphthyl, tetrahydronaphthyl or acenaphthenyl group, which groups may be substituted, the compounds containing at least one non-aromatic ring. Such compounds are useful as optical whitening agents, for example in textile material or paper.
    Type: Grant
    Filed: November 30, 1978
    Date of Patent: August 5, 1980
    Assignee: Hickson & Welch Limited
    Inventors: Hugh Davidson, Keith T. Johnson, Brian E. Leggeter, Anthony J. Moore