Patents by Inventor Laszlo Zsembery

Laszlo Zsembery 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).

  • Priming and body paint having an active anti-corrosive and surface cleaning effect
    Patent number: 4828617
    Abstract: The present invention relates to a priming or body paint having active anti-corrosive and surface cleaning effect containing binding material, pigment and optionally solvent, filler and/or additives, characterized in that said pigment, optionally in addition to other known pigments, comprises:(a) 30-70% parts by weight, preferably 40-55% by weight of alumina hydrate (Al/OH/.sub.3),(b) 20-55% by weight of at least of one of atoxic oxides, hydroxides, oxide hydroxides, carbonates or phosphates of amphoteric elements or metals of variable valency possessing less valency than the maximum, in case of aluminum the oxide or hydroxide thereof,(c) 0-50% by weight, preferably 2-15% by weight of calcium and/or magnesium carbonate,and the grain size thereof is <20 .mu.m, preferably 2-10 .mu.m.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: May 9, 1989
    Assignee: Magyar Aluminiumipari Troszt
    Inventors: Zsolt Csillag, Tibor Kalman, Laszlo Zsembery, Geza Szentgyorgyi, Gyorgy Keebe, Eva Hidvegy, Karoly Solymar
  • Process for the preparation of alkali-poor .alpha.-alumina for ceramic purposes
    Patent number: 4477427
    Abstract: Process for the preparation of alkali-poor .alpha.-alumina for ceramic purposes. Technical grade aluminum hydroxide is activated and calcinated in the presence of a mineralizing mixture comprising halides and boron compounds. The process further comprises activating aluminum hydroxide at a temperature of 500-600 degrees C., washing the activated product with alkali-free water containing calcium ions and having a conductivity not exceeding 70 .mu.S/cm until the alkali content expressed in Na.sub.2 O becomes lower than 0.15% by weight, adding 0.4-0.7% by weight of a mineralizing mixture to the washed product, and calcinating the same at a temperature of 1200-1350 degrees C.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: October 16, 1984
    Assignee: Magyar Aluminiumipari Troeszt
    Inventors: Jozsef Matyasi, Gyorgy Kaptay, Laszlo Zsembery, Bela Kokeny, Jozsef T. Toth, Maria Toth Nee Homostrei, Imre Penzes
  • Process for preparing alumina being suitable for layer chromatography
    Patent number: 4225639
    Abstract: The invention relates to a process for preparing alumina being suitable for layer chromatography.The alumina suitable for layer chromatography is prepared in accordance with the invention in such a manner that an aluminium trinydroxyde containing 34 to 37% by weight of bayerite, 3 to 5% by weight of pseudoboehmite and 60 to 62% by weight of amorphous aluminium trihydroxide is heated at 300.degree. C. to 400.degree. C. for 2 to 4 hours.The activated alumina thus produced is snow-white, has a large specific surface and its average grain size is within the range between 8 and 20 .mu.m.The product complies with the requirements of layer chromatographical technique.
    Type: Grant
    Filed: June 19, 1979
    Date of Patent: September 30, 1980
    Assignee: Magyar Aluminiumipari Troszt
    Inventors: Jozsef Matyasi, Bela Kokeny, Laszlo Zsembery, Gyorgy Kaptay, Sandor Nemeth