Patents by Inventor Otto Vitzthum

Otto Vitzthum 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 extraction of caffeine from super-critical solutions
    Patent number: 4411923
    Abstract: A process for extracting caffeine from raw coffee, roast coffee, tea and the like. Super-critical carbon dioxide is used as extracting agent, and ion-exchangers are used to absorb the caffeine, and are subsequently regenerated by use of aqueous regenerating agents.
    Type: Grant
    Filed: February 9, 1981
    Date of Patent: October 25, 1983
    Assignee: HAG Aktiengesellschaft
    Inventors: Peter Hubert, Otto Vitzthum
  • Method of extracting coffee oil containing aroma constituents from roasted coffee
    Patent number: 4328255
    Abstract: A method of extracting coffee oil containing aromatic constituents in high yield and in stable form by extracting solid, roasted coffee with dry carbon dioxide under super-critical conditions of temperature and pressure.
    Type: Grant
    Filed: June 8, 1977
    Date of Patent: May 4, 1982
    Assignee: Studiengesellschaft Kohle m.b.H.
    Inventors: Wilhelm Roselius, Otto Vitzthum, Peter Hubert
  • Process for the production of spice extracts
    Patent number: 4198432
    Abstract: Process for the preparation of spice extracts by extraction of the natural spice with a supercritical gas such as carbon dioxide in which the aroma contents are first extracted with a dry gas, the flavor contents are then extracted with a moist gas and the extracted materials recovered and mixed.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: April 15, 1980
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Otto Vitzthum, Peter Hubert
  • Method for the manufacture of caffeine free black tea
    Patent number: 4167589
    Abstract: A caffeine free black tea product is produced by an extraction procedure with a supercritical gas such as carbon dioxide in which first the aromatic content of the tea is extracted with dry gas, then the caffeine content is extracted with wet gas, and finally the decaffeinated tea is reimpregnated with the aromatic content.
    Type: Grant
    Filed: April 26, 1977
    Date of Patent: September 11, 1979
    Inventors: Otto Vitzthum, Peter Hubert
  • Process for the extraction of nicotine from tobacco
    Patent number: 4153063
    Abstract: Process for extracting nicotine is disclosed in which tobacco is exposed to an extracting solvent in either liquid or gaseous state at temperatures below about 100.degree. C. and at high pressures. The aroma generating substances can be removed by conducting the extraction with the tobacco in dry condition. Thereafter the tobacco can be moistened, and on further contacting the nicotine is removed. The aroma generating substances can then be recombined with nicotine free tobacco.
    Type: Grant
    Filed: August 23, 1973
    Date of Patent: May 8, 1979
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Wilhelm Roselius, Otto Vitzthum, Peter Hubert
  • Pressure relief valve for packing containers
    Patent number: 4134535
    Abstract: A pressure relief valve for packages in which the valve element comprises a liquid impregnated porous element covering outlet openings in the package, with the liquid layer in the porous element being torn open by package contents pressures in excess of a predetermined value to permit gas outflow from the package.
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: January 16, 1979
    Assignee: HAG Aktiengesellschaft
    Inventors: Manfred Barthels, Peter Werkhoff, Otto Vitzthum
  • Process for the production of spice extracts
    Patent number: 4123559
    Abstract: Process for the preparation of spice extracts by extraction of the natural spice with a supercritical gas such as carbon dioxide in which the aroma contents are first extracted with a dry gas; the flavor contents are then extracted with a moist gas and the extracted materials recovered and mixed.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: October 31, 1978
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Otto Vitzthum, Peter Hubert
  • Production of hop extracts
    Patent number: 4104409
    Abstract: Process for extraction of hops utilizing supercritical gases such as carbon dioxide.
    Type: Grant
    Filed: January 6, 1976
    Date of Patent: August 1, 1978
    Assignee: Studiengesellschaft Kohle mbH
    Inventors: Otto Vitzthum, Peter Hubert, Wolfgang Sirtl