Patents by Inventor Friedhelm Schnippering

Friedhelm Schnippering 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: 5545253
    Abstract: A binder composition for storable zinc dust paints contains a mixture of silicic acid esters, solvents, curing agents, an antideposition agent, and a dearomatized aliphatic hydrocarbon mixture with an average molecular weight of 133. The binder composition has a flash point distinctly higher than 21.degree. C.
    Type: Grant
    Filed: January 26, 1995
    Date of Patent: August 13, 1996
    Assignee: Huls Aktiengesellschaft
    Inventors: Roland Edelmann, Friedhelm Schnippering, Christine Fliedner, Reinhard Matthes
  • Patent number: 5384350
    Abstract: A binder composition for zinc dust paints contains silicic acid esters, solvents, curing agents, an anti-settling agent and n-butyl acetate. The composition has a flash point above 21.degree. C.
    Type: Grant
    Filed: August 6, 1993
    Date of Patent: January 24, 1995
    Assignee: Huls Aktiengesellschaft
    Inventors: Christine Fliedner, Friedhelm Schnippering, Karl-Martin Rodder, deceased, Reinhard Mattes
  • Patent number: 4715895
    Abstract: The present invention relates to the production of molds for the casting of metal. The molds are made of refractory materials bound together by a binding agent on the basis of a partially hydrolyzed, partially condensed silicic acid ester. A slip consisting of binding agent and refractory material is applied to the model alternately with a granular refractory sanding material. In accordance with the invention, the granular refractory sanding material contains the agent for hardening the binding agent. The method of the invention makes possible the dimensionally accurate reproduction of even relatively large models, while the slip can be stored over a relatively long period of time without loss of its action.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: December 29, 1987
    Assignee: Dynamit Nobel AG
    Inventors: Friedhelm Schnippering, Karl-Martin Rodder
  • Patent number: 4321401
    Abstract: A process for the preparation of partial hydrolyzates of orthosilicic acid tetra(alkoxyalkyl) ester having a stable shelf life is described by hydrolysis of a silicic acid tetra(alkoxyalkyl) ester with water, suitably in the presence of an acid and optionally in the presence of a solvent, wherein the stoichiometrically necessary amount of water is present at the commencement of the reaction.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: March 23, 1982
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Heinz Nestler, Friedhelm Schnippering
  • Patent number: 4254009
    Abstract: A binder for a pigmentous composition containing a silicic acid ester which in turn contains at least one alkoxyalkyl group, a pigmentous composition, especially a zinc dust paint, comprising said binding agent and a paint composition comprising said binding agent and a resin preferably further containing a pigment.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: March 3, 1981
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Werner Dittrich, Heinz Nestler, Friedhelm Schnippering
  • Patent number: 4211567
    Abstract: A ceramic molding composition comprising an alcoholate of aluminum or a metal of the fourth sub-group of the Periodic System, a refractory metal oxide and a polyvalent alcohol, an improvement in the formation of a ceramic product wherein a ceramic molding composition is shaped and hardened, which improvement resides in employing the above defined ceramic molding composition.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: July 8, 1980
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Werner Dittrich, Walter Josten, Heinz Nestler, Friedhelm Schnippering
  • Patent number: 4159204
    Abstract: A ceramic molding composition comprising an alcoholate of aluminum or a metal of the fourth sub-group of the Periodic System, a refractory metal oxide and an agent selected from the group consisting of diketones of the formula ##STR1## wherein R.sub.1 and R.sub.2 are each independently an aliphatic radical of between C.sub.1 and C.sub.18 carbon atoms or an aromatic radical from C.sub.6 to C.sub.18 carbon atoms, a hydroxycarboxylic acid compound of the formula ##STR2## wherein R.sub.3 is an aliphatic radical of C.sub.1 and C.sub.18 or an aromatic radical from C.sub.6 to C.sub.18, and R.sub.4 is hydrogen or an alkyl radical of C.sub.1 to C.sub.4, and a polyvalent alcohol, an improvement in the formation of a ceramic product wherein a ceramic molding composition is shaped and hardened, which improvement resides in employing the above defined ceramic molding composition.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: June 26, 1979
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Werner Dittrich, Walter Josten, Heinz Nestler, Friedhelm Schnippering
  • Patent number: 4059453
    Abstract: An improvement in a process for making a mold for metal casting by applying a fluid ceramic composition containing binding agent and finely divided refractory substance to a pattern and hardening the same, which improvement comprises employing a ceramic composition which contains special solvents, anti-setting and thixotropic agents, so that this composition after applying gives a uniform coat which does not run down from walls.
    Type: Grant
    Filed: May 12, 1976
    Date of Patent: November 22, 1977
    Assignee: Dynamit Nobel AG
    Inventors: Werner Dittrich, Friedhelm Schnippering