Patents by Inventor Roger Scartazzini

Roger Scartazzini 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).

  • Concentrated aqueous liquid formulations of color formers
    Patent number: 5421870
    Abstract: The invention relates to concentrated aqueous liquid formulations of color formers comprising(a) as color former one or more fluorans of formula (1),(b) as anionic surfactants(ba) sulfated alkanes(bb) alkanesulfonates(bc) sulfonated carboxylates or(bd) sulfated carboxylates, and(be) acid esters or salts thereof of polyadducts of alkylene oxides, and(c) a thickener.The formulations are used in heat-sensitive recording materials.
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: June 6, 1995
    Assignee: Ciba-Geigy Corporation
    Inventors: Roger Scartazzini, Klaus Huber