Patents Examined by Amelia Yarbrough
  • Initially erasable ball pen ink
    Patent number: 4738725
    Abstract: A ball pen ink of transiently erasable type to be dispensed from a pressurized ball pen incorporates an elastommeric polymer, pigment and a mixed solvent system. The mixed solvent system includes a volatile solvent component, a non-volatile solvent component and a non-volatile solvent/plasticizer component in such relative amounts and with relation to the elastomer and pigment combination as achieves a balance between ink viscosity and thixotropy to provide good writing qualities.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: April 19, 1988
    Assignee: Scripto-Tokai, Inc.
    Inventors: Phillip M. Daugherty, Robert R. Massey
  • Asphaltic composition
    Patent number: 4711672
    Abstract: An asphaltic composition having improved temperature susceptibility and a method of manufacturing the improved asphaltic composition are disclosed. The improvement is directed at the addition of a stabilizing agent selected from the group consisting of Group IA sulfates, Group IIB sulfates and mixtures thereof.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: December 8, 1987
    Assignee: Exxon Research and Engineering Company
    Inventors: Helen R. Gorter, Lyle E. Moran, Warren D. Robertson, Shaunalea Savard
  • Isoindoline colorants
    Patent number: 4311527
    Abstract: Plastics, finishes and printing inks which contain, as the colorant, one or more compounds of the formula ##STR1## where A is hydrogen or phenyl andB is hydrogen, C.sub.1 -C.sub.4 -alkyl, phenyl or carbo-C.sub.1 -C.sub.4 -alkoxy, the phenyl radicals and the ring C being unsubstituted or substituted by groups which do not confer solubility, andthe four groups A and B may be identical or different from one another.The colorants have a high tinctorial strength and the colorations have good fastness characteristics and high infrared reflectance.
    Type: Grant
    Filed: March 4, 1980
    Date of Patent: January 19, 1982
    Assignee: BASF Aktiengesellschaft
    Inventor: Wolfgang Lotsch