Patents by Inventor Lothar Zehe

Lothar Zehe 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).

  • Patent number: 6585941
    Abstract: An apparatus safely fills and empties a pressurized vessel charged with flammable and/or reactive gas. The apparatus features an upper flap combination, an intermediate lock vessel having a flushing apparatus, and a lower flap combination. The present invention also relates to a pressurized reactor which is charged with flammable and/or reactive gas and is equipped with a filling lock apparatus and an emptying lock apparatus for the simultaneous preparation of tetrachlorosilane, trichlorosilane and hydrogen. In addition, the present invention relates to a special process for filling and emptying such a reactor.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: July 1, 2003
    Assignee: Degussa AG
    Inventors: Lothar Zehe, Mieczyslaw Kuzma, Hartwig Rauleder
  • Patent number: 6372190
    Abstract: The present invention relates to an apparatus for the safe filling and emptying of a pressurized vessel charged with flammable and/or aggressive gas. The apparatus features an upper flap combination, an intermediate lock vessel having a flushing apparatus, and a lower flap combination. The present invention also relates to a pressurized reactor which is charged with flammable and/or aggressive gas and is equipped with a filling lock apparatus and an emptying lock apparatus for the simultaneous preparation of tetrachlorosilane, trichlorosilane and hydrogen. In addition, the present invention relates to a special process for filling and emptying such a reactor.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: April 16, 2002
    Assignee: Degussa AG
    Inventors: Lothar Zehe, Mieczyslaw Kuzma, Hartwig Rauleder
  • Publication number: 20010048908
    Abstract: The present invention relates to an apparatus for the safe filling and emptying of a pressurized vessel charged with flammable and/or aggressive gas. The apparatus features an upper flap combination, an intermediate lock vessel having a flushing apparatus, and a lower flap combination. The present invention also relates to a pressurized reactor which is charged with flammable and/or aggressive gas and is equipped with a filling lock apparatus and an emptying lock apparatus for the simultaneous preparation of tetrachlorosilane, trichlorosilane and hydrogen. In addition, the present invention relates to a special process for filling and emptying such a reactor.
    Type: Application
    Filed: August 13, 1999
    Publication date: December 6, 2001
    Inventors: LOTHAR ZEHE, MIECZYSLAW KUZMA, HARTWIG RAUDLER
  • Patent number: 6142024
    Abstract: An apparatus and method for the sampling and quantitative, IR-spectroscopic determination of impurities in hygroscopic liquids. The apparatus includes a stainless steel tube having a straight bore, a first end, and a second end. A first flange attachment is located at the first end of the stainless steel tube, and a second flange attachment is located at the second end of the stainless steel tube. First and second calcium fluoride plates are also located at the first and second ends of the steel tube, respectively. The first and second plates are oriented parallel to each other and perpendicular to the axis of the stainless steel tube. First and second outer flanges hold respective of the first and second plates in place at the first and second ends of the tube, respectively, and the first and second outer flanges are mechanically fixed to the first and second flange attachments, respectively. At least one seal separates the first plate from the first flange attachment and the first outer flange.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: November 7, 2000
    Assignee: Huls Aktiengesellschaft
    Inventors: Hartwig Rauleder, Klaus-Dieter Krieger, Lothar Zehe