Patents by Inventor George Jurkiewitsch

George Jurkiewitsch 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).

  • Process for preparing filter rods
    Patent number: 4798570
    Abstract: An improved process for preparing fiber rods useful as cigarette filter tips comprises feeding a synthetic fiber tow through an air jet bulker directly into the garniture of a conventional cigarette filter making apparatus. The process allows production of filters with lower denier tow than has heretofore been possible while affording to the manufacturer greater versatility to change filter characteristics more readily.
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: January 17, 1989
    Assignee: Hercules Incorporated
    Inventor: George Jurkiewitsch
  • Conjugate filaments
    Patent number: 4115620
    Abstract: Conjugate filaments which exhibit a high degree of spontaneous crimp and good modulus are described. The filaments comprise at least 2 components, one of which being a blend of polypropylene with 5 to about 50% of certain low molecular weight hard resins derived from hydrocarbons having at least 4 carbon atoms or rosin derivatives and another component being polypropylene or a blend of polypropylene and a different amount of the hard resin or rosin derivative.
    Type: Grant
    Filed: January 19, 1977
    Date of Patent: September 19, 1978
    Assignee: Hercules Incorporated
    Inventors: Rakesh Kumar Gupta, George Jurkiewitsch, Lawrence Joseph Logan