Patents by Inventor Thomas M. Donuiff

Thomas M. Donuiff 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).

  • Moldable silane-crosslinked polyolefin foam beads
    Patent number: 4870111
    Abstract: Moldable foam beads comprising a silane-crosslinked polyolefin foam are produced by mixing a composition comprising a silane-modified polyolefin (such as a silane-grafted polyethylene) and a silanol condensation catalyst in an extruder to produce a melt, then injecting a blowing agent into the melt at a rate effective to produce a desired foam density in the extrudate; extruding and cutting the melt to form foam beads; and exposing the foam beads to moisture to produce silane crosslinking of the polyolefin foam.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: September 26, 1989
    Assignee: Astro-Valcour, Incorporated
    Inventors: Thomas M. Donuiff, Frederick H. Collins