Patents by Inventor Ivan Lorant

Ivan Lorant 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 production of chemically bonded non-woven sheet materials containing a binder of microheteroporous structure
    Patent number: 4397892
    Abstract: A process for the production of chemically bonded non-woven material, such as synthetic leather, is disclosed wherein a fiber fleece is impregnated with a heat sensitized polymer dispersion and the composition is destabilized to form a porous gel structure. Finally, the polymer is crosslinked at below 150.degree. C. and is dehydrated. Additionally, cut fibers of polyester of polyamide are formed into a fleece and an aqueous dispersion of butadiene-styrene coagulant and a curing composition is impregnated through the fleece. The binder is gelled and cured in superheated steam. The products obtained are soft and possess excellent physical and mechanical properties as well as superior dynamic stressability.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: August 9, 1983
    Assignees: Bor-,Mubor-,es Cipoipari kutato Intezet, Graboplast, Gyori Pamutszovo-es Muborgyar
    Inventors: Ivan Lorant, Gyula Murlasits, Gyula Wlasitsch, Ferenc Farkas, Geza Szomolanyi
  • Process for the production of water vapor-permeable sheet materials
    Patent number: 4336300
    Abstract: The specification describes water vapor-permeability sheet materials, particularly useful in the footwear industry. The production of sheet materials which are water permeable, highly resistant to wear, water resistant and mechanically stressable occurs by mechanically foaming a polymeric dispersion, the mechanical foaming being carried out in the presence of a surfactant, the density of the film being adjusted by the mechanical foaming to 0.55-0.85 g/cm.sup.3, gelling the foamed dispersion at a temperature of 120.degree. to 220.degree. C., for at most 10 minutes, and finishing the sheet material by spraying and/or rastering.
    Type: Grant
    Filed: April 30, 1980
    Date of Patent: June 22, 1982
    Assignees: Bor-, Mubor-es Cipoipari Kutato Intezet, Graboplast Gyori Pamutszovo-es Muborgyar
    Inventors: Ivan Lorant, Imre Csernyanszky, Gyula Murlasits, Rezso Rusznyak, Paula Szabo nee Paulyuk
  • Press mold for producing microcellular shaped pieces of dimensional accuracy, particularly shoe soles
    Patent number: 4047860
    Abstract: Press molds for vulcanizing plastic materials comprise a pair of mold parts defining between them a mold cavity. One of the parts is a die and the other is a cover plate that defines with the die the mold cavity. A hot liquid is introduced into a lower portion of the mold cavity through the die and gas is removed from the upper portion of the mold cavity through the cover plate. As a result, both prevulcanization and after vulcanization can be achieved in one single press mold, by surrounding the material in the mold with hot liquid in the prevulcanization and then withdrawing the liquid when the molded material fills the die cavity in the second stage of vulcanization.
    Type: Grant
    Filed: February 26, 1975
    Date of Patent: September 13, 1977
    Assignees: Bor-, Cipo-, Szormeipari Kutato Intezet, Vseojuzny Nauchno-Issledovatelsky Institut Plenochnykh Materialov I Iskusstvennoi Kozhi
    Inventors: Boris Nisonovich Dinzburg, Jury Alexandrovich Smetkin, Vladimir Iosifovich Alexeenko, Vsevolod Andreevich Mikhailov, Ivan Lorant, Gyozo Seltenreich, Jeno Keszei, Gyorgy Marton, Albert Balazsfai, Jeno Donath, Erno Bolcskei