Patents by Inventor Hansjorg Stoller

Hansjorg Stoller 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 manufacture of a pulverous preparation
    Publication number: 20020086059
    Abstract: A process for producing pulverous, i.e., powdered, preparations from sparingly soluble solid materials is disclosed. The process utilizes dimethyl ether under conditions of elevated temperature and pressure to dissolve the solid material. Upon release of the pressure, the solid material precipitates as a fine powder and the gaseous dimethyl ether is released or drawn off.
    Type: Application
    Filed: October 23, 2001
    Publication date: July 4, 2002
    Applicant: ROCHE VITAMINS INC.
    Inventors: Alexander Bausch, Siegfried K.F. Peter, Kurt Steiner, Hansjorg Stoller, Eckhard Weidner
  • Process for the manufacture of a pulverous preparation
    Publication number: 20010031282
    Abstract: A process for producing pulverous, i.e., powdered, preparations from sparingly soluble solid materials is disclosed. The process utilizes dimethyl ether under conditions of elevated temperature and pressure to dissolve the solid material. Upon release of the pressure, the solid material precipitates as a fine powder and the gaseous dimethyl ether is released or drawn off.
    Type: Application
    Filed: November 30, 2000
    Publication date: October 18, 2001
    Applicant: ROCHE VITAMINS INC.
    Inventors: Siegfried K. F. Peter, Kurt Steiner, Hansjorg Stoller, Eckhard Weidner
  • Process for the manufacture of a pulverous preparation
    Publication number: 20010000143
    Abstract: A process for producing pulverous, i.e., powdered, preparations from sparingly soluble solid materials is disclosed. The process utilizes dimethyl ether under conditions of elevated temperature and pressure to dissolve the solid material. Upon release of the pressure, the solid material precipitates as a fine powder and the gaseous dimethyl ether is released or drawn off.
    Type: Application
    Filed: November 30, 2000
    Publication date: April 5, 2001
    Applicant: ROCHE VITAMINS INC.
    Inventors: Alexander Bausch, Siegfried K. F. Peter, Kurt Steiner, Hansjorg Stoller, Eckhard Weidner
  • Powdered aqueous carotenoid dispersions
    Patent number: 5364563
    Abstract: A novel process for producing powdered carotenoid preparations, in which a suspension of a carotenoid in a high-boiling oil is brought into contact with superheated steam during a maximum period of 30 seconds, and subsequently emulsified the liquified solution of said carotenoid in oil produced by said contact with superheated steam in an aqueous solution of a colloid and then spraying and drying said emulsion to a powder.
    Type: Grant
    Filed: January 25, 1994
    Date of Patent: November 15, 1994
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Ernst Cathrein, Hermann Stein, Hansjorg Stoller, Klaus Viardot
  • Cyclodextrin-polyene inclusion complexes
    Patent number: 5221735
    Abstract: Inclusion complexes of the polyenes apocarotenal and lycopene in a cyclodextrin as well as their manufacture are described. The inclusion complexes are soluble in water, alcohol or water/alcohol mixtures.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: June 22, 1993
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Bruno Leuenberger, Hansjorg Stoller
  • Isomerization
    Patent number: 4861890
    Abstract: A process for producing chiral enamines by isomerizing a beta, gamma unsaturated amine with a rhodium-diphosphine complex with the addition of an achiral triarylphosphine and, if desired, hydrolyzing the compound of the enamine I obtained to the corresponding aldehyde.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: August 29, 1989
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Bernd Heiser, Hansjorg Stoller
  • Novel vitamin A acetate process
    Patent number: 4254281
    Abstract: There is disclosed a novel process for the preparation of vitamin A acetate whereby .gamma.-acetoxy-tiglic aldehyde is reacted with the salt formed by the reaction of vinyl-.beta.-ionol, triphenylphosphine and an acid.
    Type: Grant
    Filed: July 25, 1979
    Date of Patent: March 3, 1981
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Kuno Schleich, Hansjorg Stoller
  • Manufacture of polyene compounds via a Wittig reaction in a two phase solvent system
    Patent number: 4081470
    Abstract: Polyene compounds such as vitamin A acetate are prepared by reacting triarylphosphonium salts with aldehydes in a two-phase aqueous-organic solvent system.
    Type: Grant
    Filed: August 4, 1976
    Date of Patent: March 28, 1978
    Assignee: Hoffman-La Roche Inc.
    Inventors: Kuno Schleich, Hansjorg Stoller
  • Isomerization process
    Patent number: 4051174
    Abstract: A process for isomerizing vitamin A and derivatives thereof utilizing either palladium or a palladium containing compound as a catalyst.
    Type: Grant
    Filed: August 16, 1974
    Date of Patent: September 27, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Hansjorg Stoller, Hans Peter Wagner
  • Photochemical isomerization of vitamin A compounds
    Patent number: 4026778
    Abstract: A novel procedure for photochemical isomerization of vitamin A compounds or derivatives thereof in the absence of sensitizers is disclosed.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: May 31, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Michel Lalonde, Hansjorg Stoller