Patents by Inventor Keith N. Paskins

Keith N. Paskins 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: 4204879
    Abstract: This invention concerns a range of amino-acid salts of anionic dyestuffs which have a high solubility in organic solvents, particularly oxygenated, halogenated and amido organic solvents. The amino-acid dyestuff salts have the general formula:[Am.sup.+ ].sub.n-g A.sup.n- [Cat.sup.+ ].sub.q (1)wherein Am.sup.+ is an amino-acid portion of the formula: ##STR1## in which L.sup.2 is a radical of the formula:--(CR.sup.4 R.sup.5).sub.x --where R.sup.4 and R.sup.5 are each, independently of one another, selected from the group consisting of hydrogen, linear and branched lower alkyl, unsubstituted and substituted aryl and unsubstituted and substituted amino, and x is an integer,R.sup.1, R.sup.2 and R.sup.3 are each, independently of one another, selected from the group consisting of hydrogen, alkyl, aryl, alkaryl, aralkyl and the radical of the formula:--L.sup.1 --COOHwhere L.sup.2 is any of the radicals of L.sup.1, and which alkyl radicals and moities of R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: December 7, 1977
    Date of Patent: May 27, 1980
    Assignee: Williams (Hounslow) Limited
    Inventors: Keith N. Paskins, Duncan C. Redman, Ian D. Turner