Patents by Inventor David R. Joy

David R. Joy 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).

  • Patent number: 4229313
    Abstract: A cleaning or bleaching composition comprises water, an alkali metal hypochlorite and an amine oxide comprising a R--CH(R')--CH.sub.2 --group.
    Type: Grant
    Filed: August 11, 1978
    Date of Patent: October 21, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventor: David R. Joy
  • Patent number: 4214998
    Abstract: Fabric softening compositions comprise alcoholic solutions or aqueous dispersions of a mixture of quaternary ammonium compounds having the general formula: ##STR1## in which X represents a quaternary anion, for example chloride, bromide, iodide, methylsulphate, R.sub.1 and R.sub.2, which may be the same or different within a molecule, are long chain alkyl groups containing from 13 to 19 carbon atoms in each group, the groups being both straight chain and branched and in which the amount of branching is in the range between 30% and 70%, and particularly mixtures of quaternary compounds in which the substituents R.sub.1 and R.sub.2 are alkyl groups containing 13 and 15 carbon atoms comprising 65 to 75% C.sub.13 groups with 35 to 25% C.sub.15 groups (the percentages being calculated on the total of long chain alkyl groups) with 40 to 55 wt % straight chain and 60 to 45 wt % 2-alkyl branched chain where the 2-alkyl groups is predominantly methyl.
    Type: Grant
    Filed: February 7, 1979
    Date of Patent: July 29, 1980
    Assignee: Imperial Chemical Industries Limited
    Inventor: David R. Joy