Patents by Inventor Robert A. Wallace

Robert A. Wallace 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).

  • Mixer and/or heat exchanger device
    Patent number: 4176969
    Abstract: A mixer and/or heat exchanger for flowable compositions includes dual, parallel, interconnected cylindrical mixing chambers through which intermeshing, counterrotating bladed mixer elements extend. The mixer blades sweep virtually the entire inner surface area of the chambers and the entire volume within the chambers. The interconnection between the chambers is designed to minimize unswept space within the chambers, and heat exchange medium is circulated around the chambers so the system can be used to heat or cool the composition moving through the mixer.
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: December 4, 1979
    Assignee: Polymer Research, Inc.
    Inventors: Robert A. Wallace, J. L. McCurdy