Patents by Inventor Petrus Wilhelmus Van Der Zon

Petrus Wilhelmus Van Der Zon 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).

  • Infusion packets
    Patent number: 5863575
    Abstract: Packets containing a flowable material are provided with a draw-string or thread to squeeze the packet contents. The packet envelope is formed from a doubled-over web which gives the packet a folded-over edge and which encloses an intermediate portion of the thread close to the folded-over edge. The end portions of the web extend from the intermediate portion of the thread to extend through the opposite edge of the packet. The external ends of the thread are secured to a tag which is attached to the outer face of the envelope. The thread intermediate portion is retained close to the folded-over edge by heat sealing. Apparatus is also described for producing the packets in a continuous or semi-continuous manner.
    Type: Grant
    Filed: June 13, 1996
    Date of Patent: January 26, 1999
    Assignee: Lipton, Division of Conopco, Inc.
    Inventors: Jan Kuipers, Simon Charles Martin, Geoffrey William Vernon, Petrus Wilhelmus Van Der Zon