Patents by Inventor Andrew R. Oleszczuk

Andrew R. Oleszczuk 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).

  • Meltblown polyethylene fabrics and processes of making same
    Patent number: 5616408
    Abstract: A nonwoven web of meltblown microfibers formed of a composition of polyethylene and at least one component added to provide processing stability to the polyethylene component. The meltblown web can be produced at high polymer throughputs and exhibits good barrier properties. The meltblown web is useful as a component of a composite fabric, which can be used for barrier application in medical and industrial applications.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: April 1, 1997
    Assignee: Fiberweb North America, Inc.
    Inventors: Andrew R. Oleszczuk, Scott L. Gessner
  • Composite nonwoven fabric and articles produced therefrom
    Patent number: 5484645
    Abstract: The invention is directed to a composite nonwoven fabric comprising first and second nonwoven webs of spunbonded substantially continuous thermoplastic filaments, and a nonwoven hydrophobic microporous web of thermoplastic meltblown microfibers sandwiched between the first and second nonwoven webs. The filaments of the nonwoven spunbond webs are formed of continuous multiconstituent filaments which include a lower melting gamma radiation stable polyethylene polymer component and one or more higher melting gamma radiation stable polymer constituents, wherein a substantial portion of the surfaces of the multiconstituent filaments consists of the lower melting gamma radiation stable polyethylene constituent. The nonwoven hydrophobic microporous web is formed from a gamma radiation stable polyethylene polymer.
    Type: Grant
    Filed: December 8, 1993
    Date of Patent: January 16, 1996
    Assignee: Fiberweb North America, Inc.
    Inventors: Deborah K. Lickfield, Mark H. S. Berman, Robert F. Hyslop, Andrew R. Oleszczuk, Scott L. Gessner, Jared A. Austin