Patents by Inventor Donald L. Kain, Jr.

Donald L. Kain, Jr. 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).

  • Slot-cast intergrated interlocking film closure structure
    Patent number: 4755248
    Abstract: A method and apparatus is disclosed for producing a reclosable bag film. The bag film is produced by extruding a bag film web having a relatively thinner first portion and relatively thicker second portions which are formed unitarily with the first portion. Closure members preferably in the form of male and female fastener profiles, are formed separately from the web portion and joined to the thicker second portions before the thicker second portions have become cooled to an ambient temperature.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: July 5, 1988
    Assignee: The Dow Chemical Company
    Inventors: Herbert B. Geiger, Donald L. Kain, Jr.