Patents by Inventor Ivan Gbur

Ivan Gbur 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).

  • Porous web material
    Patent number: 6548433
    Abstract: A fibrous, porous web material of the heat seal type having improved particulate retention properties for use in the manufacture of beverage infusion bags. The material comprises juxtaposed, successively wet laid first (1), second (5) and third (7) fibrous layers, at least one of said layers incorporating heat sealable fibres. The fibres in the first layer are of greater aspect ratio than those in the second layer which are of higher aspect ratio than those in the third layer.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: April 15, 2003
    Assignee: J. R. Compton Limited
    Inventors: Ivan Gbur, Brian Tomkinson, Joyce Alston
  • Porous web material
    Patent number: 6139883
    Abstract: A fibrous, porous web material of the non-heat seal tissue having a basis weight of 9-18 gm-2 and comprises a first layer and a second layer juxtaposed thereto wherein the second layer. The first layer comprising vegetable fibers and a second layer comprising hardwood fibers, the second layer has a smaller pore size than the first layer. The paper is useful for producing beverage infusion bags (e.g. teabags) from which there is minimal passage of fine particles from the bags into their packaging.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: October 31, 2000
    Assignee: J. R. Crompton Limited
    Inventors: Ivan Gbur, Brian Tomkinson, Joyce Alston