Patents by Inventor Stanislaw Jozef Kropiwnicki

Stanislaw Jozef Kropiwnicki 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).

  • Apparatus for production of yarn from natural and chemical fibres
    Patent number: 3994120
    Abstract: Apparatus for production of yarn from natural or chemical fibres comprising a fixed annular chamber having opposite ends with a closure member at one of the ends having a duct therein for discharge of yarn. A suction pipe is introduced into the chamber at the other of its ends and a helical duct is formed between the outer surface of the suction pipe and the inner surface of the chamber through which air is introduced into the chamber in a helical whirl. A duct is disposed between the closure member and the suction pipe for introducing raw material into the chamber.
    Type: Grant
    Filed: July 25, 1974
    Date of Patent: November 30, 1976
    Assignee: Instytut Wlokniennictwa
    Inventors: Czeslaw Radom, Ryszard Karol Jozwicki, Stanislaw Jozef Kropiwnicki, Henryk Kubica, Mieczyslaw Hertz