Patents by Inventor William P. Mulvaney

William P. Mulvaney 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).

  • Process for production of cellular thermoplastic bodies
    Patent number: 3975473
    Abstract: A process is provided for the production of a cellular thermoplastic body, wherein solid thermoplastic material is melted under pressure in an extruder, a gaseous blowing agent is injected into the molten thermoplastic material under pressure and said molten thermoplastic material and gaseous blowing agent is passed to a zone of reduced pressure to effect the cellular expansion of said thermoplastic material by said gaseous blowing agent, and wherein said gaseous blowing agent is metered at sonic velocity at a point upstream of the injection of said gaseous blowing agent into said molten thermoplastic material.
    Type: Grant
    Filed: June 4, 1975
    Date of Patent: August 17, 1976
    Assignee: Union Carbide Corporation
    Inventor: William P. Mulvaney