Patents by Inventor Helmut Kunst

Helmut Kunst 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).

  • Method of improving the corrosion resistance of carbonitrided components made of ferrous materials
    Patent number: 5288340
    Abstract: In order to improve the corrosion resistance, carbonitrided components formed of ferrous material are treated, after an oxidation treatment, with a solution of a heat hardenable organic synthetic resin and heat-treated at 80.degree. to 200.degree. C.
    Type: Grant
    Filed: August 16, 1991
    Date of Patent: February 22, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Ulrich Christ, Helmut Kunst, Georg Wahl
  • Process for the removal of alkali metal nitrite from nitrate containing salt baths
    Patent number: 4717429
    Abstract: Undesired nitrites are formed during the treatment of salt bath nitrided structural components of iron and steel in nitrate containing cooling baths, and they must be removed from the washing water. The build-up of nitrites can be avoided by oxidizing the nitrite in the salt bath into nitrate by passing air into the cooling bath during off-times.
    Type: Grant
    Filed: August 5, 1986
    Date of Patent: January 5, 1988
    Assignee: Degussa Aktiengesellschaft
    Inventors: Helmut Kunst, Christian Scondo
  • Salt bath for nitriding iron materials
    Patent number: 4492604
    Abstract: Low cyanide nitriding salt baths which are composed of alkali cyanate and alkali carbonate and used for treating components made of steel and iron produce coatings on the surface of the component in some cases and can lead to problems in the use of the components. A satisfactory surface quality can be obtained from nitriding salt baths which additionally contain 0.5 to 100 ppm of selenium.
    Type: Grant
    Filed: October 20, 1982
    Date of Patent: January 8, 1985
    Assignee: Degussa Aktiengesellschaft
    Inventors: Johannes Muller, Helmut Kunst, Christian Scondo
  • Process for increasing the corrosion resistance of nitrided structural parts made of iron material
    Patent number: 4292094
    Abstract: To increase the corrosion resistance of nitrided structural parts made of iron materials which are useful for all types of iron and steel there is carried out an oxidation treatment in connection with the nitriding process. The oxidation treatment is carried out for 15 to 50 minutes in an oxidizing salt bath. The salt bath preferably consists of alkali hydroxides with 2 to 20% of alkali nitrates.
    Type: Grant
    Filed: August 13, 1980
    Date of Patent: September 29, 1981
    Assignee: Degussa Aktiengesellschaft
    Inventors: Helmut Kunst, Christian Scondo
  • Process for removal of hardening and galvanizing waste water
    Patent number: 4178244
    Abstract: Waste waters from salt bath hardening and galvanizing operations are removed through evaporation of the injurious material containing waste water and complete detoxification of the concentrate from the evaporation. The waste waters are first brought to a salt content of 300-500 grams/liter and this concentrated solution is then supplied to a molten salt bath.
    Type: Grant
    Filed: July 19, 1977
    Date of Patent: December 11, 1979
    Assignee: Deutsche Gold- und Silber Scheideanstalt vormals Roessler
    Inventors: Helmut Kunst, Georg Wahl
  • Boriding agent for boriding mass produced parts of ferrous and non-ferrous metals
    Patent number: 4126488
    Abstract: There is provided a boriding agent for mass produced parts of ferrous and non-ferrous metals consisting essentially of a boron yielding material, activator, filler and water as a binder and containing in the boriding agent 2 to 8 weight % of pyrogenic silica.
    Type: Grant
    Filed: June 28, 1977
    Date of Patent: November 21, 1978
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Helmut Kunst, Christian Scondo
  • Process for partially insulating surfaces of metal work pieces
    Patent number: 4062702
    Abstract: Portions of the surface area of metal workpieces are insulated in thermochemical treatment by covering the areas with a self-adhering textile tape having metal powder embedded in its adhesive layer.
    Type: Grant
    Filed: August 18, 1975
    Date of Patent: December 13, 1977
    Assignee: Deutsche Gold- und Silber-Scheideanstalt Vormals Roessler
    Inventors: Helmut Kunst, Christian Scondo
  • Salt bath quenching of construction parts treated with a nitriding bath
    Patent number: 4055446
    Abstract: Iron and steel construction parts which have been treated in a high cyanate, low cyanide or cyanide free nitriding salt bath or in other cyanide containing salt baths are tempered in a bath comprising an alkali metal hydroxide. There also can be present in the cooling bath 2 to 20 weight % of an alkali nitrate.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: October 25, 1977
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Helmut Kunst, Christian Scondo
  • Boriding composition
    Patent number: 3936327
    Abstract: The present invention relates to powdered boriding compositions for the production of single-phase boride layers on metal articles being substantially free from cracks in the case of mechanical stress, which comprise an activator and a mixture of a boron-releasing agent and an unreactive refractory material, such as silicon carbide.
    Type: Grant
    Filed: June 10, 1974
    Date of Patent: February 3, 1976
    Assignee: Elektroschmelzwerk Kempten GmbH
    Inventors: Walter Fichtl, Gunter Wiebke, Helmut Kunst, Alfred Graf VON Matuschka, Georg Bachmann, Alfred Lipp