Patents by Inventor Hubert Czepel

Hubert Czepel 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).

  • Modified aminoplast resins containing methylolmelamine etherified with a monoalcohol as modifier
    Patent number: 4369286
    Abstract: Modified aminoplast resins based on melamine and formaldehyde or urea and formaldehyde, which contain, as modifiers, methylolmelamines having a molar ratio of melamine to formaldehyde of 1:3 to 1:6, which are etherified with mono-alcohols having 1 to 4 carbon atoms, in a ratio of melamine to alcohol of 1:2 to 1:6. These resins are used, in particular, for the production of decorative, glossy-surface laminations.
    Type: Grant
    Filed: November 3, 1981
    Date of Patent: January 18, 1983
    Assignee: Chemie Linz Aktiengesellschaft
    Inventors: Hubert Czepel, Friedl Heger, Wilhelm Dobramysl
  • Thermally expandable sealants
    Patent number: 4277532
    Abstract: A thermally-expandable sealant for joints, cavities or holes, which foams in the event of a fire and thereby effects a seal, comprising as a carrier a fleece or fabric made of glass or plastic, which is coated with a composition based upon expandable graphite and containing, per 100 parts by weight of expandable graphite, 10 to 30 parts by weight of polychlorobutadiene, 1 to 40 parts by weight of an alkylphenol/formaldehyde resin and 1 to 3 parts by weight of stabilizers known per se, and optionally, up to 30 parts by weight of inorganic fibers and up to 80 parts by weight of aluminium hydroxide. A process for sealing joints, cavities or holes using the sealant is also disclosed.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: July 7, 1981
    Assignee: Chemie Linz Aktiengesellschaft
    Inventors: Hubert Czepel, Franz Jilek, Heinz Zochbauer
  • Additive for inorganic binders
    Patent number: 4272430
    Abstract: Additive for inorganic binders, such as cements, calcium sulfate, magnesia cement and the like, which comprises, as the active ingredient, a water-soluble salt of a mixed resin consisting of an aromatic aminosulfonic acid, urea, melamine and formaldehyde, the molar ratio, in the resin, of aromatic aminosulfonic acid to the total amount of melamine and urea being (0.2 to 1.0):1.0 and the molar ratio of melamine to urea being from 0.75:0.25 to 0.30:0.70, and also building materials, having increased flowability and early strength, in which this additive is present.
    Type: Grant
    Filed: June 8, 1979
    Date of Patent: June 9, 1981
    Assignee: Chemie Linz Aktiengesellschaft
    Inventors: Stefan Pieh, Hubert Czepel
  • Process for the manufacture of foamed plastics with improved combustion characteristics
    Patent number: 4176217
    Abstract: Production of foamed plastics with improved combustion characteristics by condensing aqueous solutions of aminoplast precondensates with at least bifunctional organic isocyanate whereby an acid curing catalyst and an accelerator for polyurethane formation is used. For performing the condensation, the aqueous solution of the precondensate is added to the mixture of isocyanate and the accelerator at the same time as but separately from the acid curing catalyst.
    Type: Grant
    Filed: January 4, 1979
    Date of Patent: November 27, 1979
    Assignee: Chemie Linz Aktiengesellschaft
    Inventors: Leopold Golser, Hubert Czepel, Gernard Stern