Patents by Inventor Andrzej Lis

Andrzej Lis 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).

  • Device for clarification of liquids and separation of precipitates
    Patent number: 4477344
    Abstract: A device for clarification of liquids and separation of precipitates is characterized by that it comprises a contact chamber 1 above which there is a multi-stream settling tank 2 and below which a chamber 6 for thickening the precipitate is comprised, and comprises an overflow pocket 5 for clarified liquid, the contact chamber 1 has the shape widening upwards, preferably the shape of an inversed cone or an inversed truncated pyramid and the axis of the contact chamber 1 is skew to the level, whereas on the upper edge of the contact chamber 1 an adjustable overflow edge 4 is situated, in the upper part of the multi-stream settling tank 2 there is an outflow unit 7, and the overflow pocket 5 is comprised below the outflow unit 7, the outflow unit 7 is constructed of many uniformly distributed outlet elements 8 which are stub pipes directed upwards and situated on the upper horizontal or inclined surface of the cover plate of the unit 7, the outlet surface of all stub pipes being situated on the same common plan
    Type: Grant
    Filed: November 3, 1982
    Date of Patent: October 16, 1984
    Assignee: Instytut Mechaniki Precyzyjnej
    Inventors: Witold Olszewski, Andrzej Lis, Pawel Pietraszek, Franciszek S. Tuznik
  • Apparatus for recovery of metals from metal plating baths and neutralizing toxic effluents therefrom
    Patent number: 4171255
    Abstract: Method for recovering metals from cyanide and hexavalent chromium plating baths comprising immersing plated articles in a reclaiming bath containing an aldehyde or an aldehyde percursor, and optionally an oxidizing agent, to precipitate the excess metal in the residual plating bath in the form of free metal or metal hydroxide and to decompose the cyanide and to reduce the hexavalent chromium to trivalent chromium. The plating bath and reclaiming bath are regenerated. Apparatus is provided to effect this process.
    Type: Grant
    Filed: November 15, 1977
    Date of Patent: October 16, 1979
    Assignee: Instytut Mechaniki Precyzyjnes
    Inventors: Franciszek Tuznik, Andrzej Lis
  • Method for recovery of metals from metal plating baths and neutralizing toxic effluents therefrom
    Patent number: 4157942
    Abstract: Method for recovering metals from cyanide and hexavalent chromium plating baths comprising immersing plated articles in a reclaiming bath containing an aldehyde or an aldehyde percursor, and optionally an oxidizing agent, to precipitate the excess metal in the residual plating bath in the form of free metal or metal hydroxide and to decompose the cyanide and to reduce the hexavalent chromium to trivalent chromium. The plating bath and reclaiming bath are regenerated. Apparatus is provided to effect this process.
    Type: Grant
    Filed: February 18, 1977
    Date of Patent: June 12, 1979
    Assignee: Instytut Mechaniki Precyzyjnej
    Inventors: Franciszek Tuznik, Andrzej Lis