Patents by Inventor Jan J. Bleeker

Jan J. Bleeker 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).

  • Process for the preparation of an aqueous solution of a heteropolysaccharide
    Patent number: 4816077
    Abstract: An aqueous solution of a heteropolysaccharide comprising glucose, galactose, pyruvic and succinic acid, is prepared by mixing a concentrate of said heteropolysaccharide with a saline aqueous medium containing from 12 to 30% w of at least one salt, and by shearing the mixture obtained.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: March 28, 1989
    Assignee: Shell Oil Company
    Inventors: George van Os, Jan J. Bleeker, Cornelis W. A. Schram
  • Process for the preparation of an aqueous solution of a heteropolysaccharide
    Patent number: 4738727
    Abstract: An aqueous solution of a heteropolysaccharide comprising glucose, galactose, pyruvic and succinic acid, is prepared by mixing a concentrate of said heteropolysaccharide with a saline aqueous medium containing from 12 to 30% w of at least one salt, and by shearing the mixture obtained.
    Type: Grant
    Filed: June 3, 1986
    Date of Patent: April 19, 1988
    Assignee: Shell Oil Company
    Inventors: George van Os, Jan J. Bleeker, Cornelis W. A. Schram
  • Biopolymer formulations and processes for preparing them
    Patent number: 4670167
    Abstract: Biopolymer formulation, in particular a polysaccharide-containing water in oil emulsion, process for preparing such emulsions and process for concentrating these emulsions. Aqueous systems thickened by the incorporation of biopolymer emulsions.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: June 2, 1987
    Assignee: Shell Oil Company
    Inventors: Jan J. Bleeker, Jan H. Lammers, Jacob B. Roest
  • Biopolymer formulations and processes for preparing them
    Patent number: 4670550
    Abstract: Biopolymer formulation, in particular a polysaccharide-containing water in oil emulsion, process for preparing such emulsions and process for concentrating these emulsions. Aqueous systems thickened by the incorporation of biopolymer emulsions.
    Type: Grant
    Filed: September 7, 1984
    Date of Patent: June 2, 1987
    Assignee: Shell Oil Company
    Inventors: Jan J. Bleeker, Jan H. Lammers, Jacob B. Roest, Rudolf J. A. Eckert
  • Borated basic metal salt and lubricating oil composition
    Patent number: 4539126
    Abstract: Oil-soluble reaction product of an oil-soluble basic alkaline earth metal salt of an organic acid, in particular of an aromatic carboxylic acid and a boron compound, in particular a boric acid. This product has superior detergent, anti-wear and anti-corrosion properties in engine oils.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: September 3, 1985
    Assignee: Shell Oil Company
    Inventors: Jan J. Bleeker, Martin Booth, Madeline G. F. M. van Grieken, Wilhelmus J. Krijnen, Gerhard D. van Wijngaarden