Patents by Inventor Johan Jozef Einerhand

Johan Jozef Einerhand 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).

  • Iron blue pigment composition and process for its production
    Patent number: 4113508
    Abstract: The production of iron blue pigment compositions by a flushing process has been found to be improved by carrying out the flushing step in the presence of an amine flushing agent and incorporating into the composition during or after flushing at least one surfactant of the polyoxyethylene type. The resulting iron blue compositions have improved consistency and dispersibility in printing inks, paints and the like.
    Type: Grant
    Filed: June 23, 1977
    Date of Patent: September 12, 1978
    Assignee: Hercules Incorporated
    Inventors: Johan Jozef Einerhand, Leonardus Johannes Hubertus Erkens, Rene Johannes Laenen, Joseph Wilhelmus Jacobus Hoofs
  • Synthesis of metal phthalocyanines
    Patent number: 4077973
    Abstract: Metal phthalocyanines having a narrow particle size distribution are synthesized via the phthalodinitrile or phthalic anhydride-urea route using hexachlorobutadiene as the diluent. Higher yields and shorter reaction times are also realized by carrying out the syntheses in this manner.
    Type: Grant
    Filed: April 7, 1976
    Date of Patent: March 7, 1978
    Assignee: Hercules Incorporated
    Inventors: Gerardus Johannes Baptist Colbers, Johan Jozef Einerhand, Leonardus Johannes Hubertus Erkens, Hubertus Bartholomeus Nicola, Jacobus Michiel Hubertus Snijders
  • Method for the manufacture of a lead chromate-containing pigment having a low acid soluble lead content
    Patent number: 4046588
    Abstract: A process for the production of lead sulfochromate or lead chromate-sulfate-molybdate type pigments having a low content of acid soluble lead, good color and tinting properties and excellent resistance to industrial environments is described. The process comprises forming the desired lead chromate-containing precipitate in acidic aqueous medium containing chloride ions and a specified excess of lead ions in the absence of a pH buffering agent, coating the precipitate with a silicon and antimony compound, adjusting the pH of the medium to below 7 and recovering the coated precipitate as a pigment.
    Type: Grant
    Filed: August 24, 1976
    Date of Patent: September 6, 1977
    Assignee: Hercules Incorporated
    Inventors: Johan Jozef Einerhand, Gerardus Johannes Baptist Colbers, Wilhelmus Martha Andreas Huck, Herman Jozef Johannes Maria Geurts