Patents by Inventor James V. Dandeneau

James V. Dandeneau 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).

  • Patent number: 4888146
    Abstract: An article such as a length of plastic tubing is integrally formed by melt extrusion and having opposite ends which in turn are provided with different flexibilities. The apparatus and extrusion method by which such articles are forming in a running length includes a gear assembly rotatable between at least two alternate positions whereby two different but mixable resins are alternatively extruded as product.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: December 19, 1989
    Inventor: James V. Dandeneau