Patents by Inventor Piotr Liberski

Piotr Liberski 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 producing layers of lead and its alloys on workpieces made of ferrous alloys
    Patent number: 4070511
    Abstract: A method of producing layers of lead and its alloys on workpieces made of ferrous alloys comprising dipping the workpieces to be coated into a two-layer bath, the upper layer of which is a bath of aluminum or its alloys, and the bottom layer of which is a bath of lead or its alloys. The workpieces are then taken out of the deeper layer of the bath of lead and its alloys by pulling them through the upper layer of the bath of aluminum and its alloys, or by pulling the workpieces through the bath of metal, provided in a vessel connected with the bottom layer of the bath.The temperature of both baths, the upper bath and of the bath in the vessel connected with the bottom bath, is maintained within the range of 150.degree. C to 900.degree. C. The temperatures of the bath of the upper layer, of the bath of the bottom layer, and of the bath in the vessel connected with the bath of the bottom layer are equal or differ from each other by 50.degree. C to 750.degree. C.
    Type: Grant
    Filed: August 9, 1976
    Date of Patent: January 24, 1978
    Assignee: Politechnika Salaska Im. Wicentego Pstrowskiego
    Inventors: Adam Gierek, Lech Bajka, Piotr Liberski, Anna Gruszecka