Patents by Inventor Cameron Cranston

Cameron Cranston 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).

  • Shear processing thermoplastics in the presence of ultrasonic vibration
    Patent number: 4793954
    Abstract: Various processing advantages are gained when ultrasonic vibration is applied to a thermoplastic processing apparatus such as an extruder or an injection molding device. Such advantages include improved flow rate, reduced processing pressure, and consequently reduced processing temperature to mold or extrude the melted thermoplastic. The ultrasonic vibration is desirably applied to the die of the processing apparatus and in a direction longitudinal to the flow of the thermoplastic. Suitable thermoplastics include polystyrene and polyolefins.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: December 27, 1988
    Assignee: The B. F. Goodrich Company
    Inventors: Biing-Lin Lee, Cameron Cranston