Patents by Inventor Davis B. Dwinell

Davis B. Dwinell 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: 4022357
    Abstract: A retractable pouring spout closure for dispensing liquid products from containers in a safe and controlled manner. The closure consists of a plastic nozzle with integrally molded captive cap for friction fit engagement within a container wall opening. A tearing diaphragm seals off the upper end of the nozzle and has a cylindrical wall depending from its lower surface within the confines of the nozzle throat. A retractable pouring spout has its upper end tightly surrounding the depending cylinderical wall in stored position so as to require breaking of the diaphragm seal prior to unplugging the spout.
    Type: Grant
    Filed: September 18, 1975
    Date of Patent: May 10, 1977
    Assignee: American Flange & Manufacturing Co., Inc.
    Inventor: Davis B. Dwinell