Patents by Inventor Stephen C. Lathrop

Stephen C. Lathrop 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).

  • Dispensing container having capillary pressure compensating valve
    Patent number: 5073057
    Abstract: Device for applying liquid materials to the skin, said device having a liquid container, a poromeric plastic applicator head, and a diaphragm spring holding the applicator in said device. The diaphragm spring provides a liquid tight seal between the poromeric applicator head and the liquid container and also allows movement of the poromeric applicator head in a vertical direction to create a pressure within the liquid container and provide force to aid in moving the liquid through the poromeric applicator head to its outer surface. The poromeric applicator head is also provided with a capillary pressure compensating valve to maintain substantially equal pressure within and without the dispensing container.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: December 17, 1991
    Assignee: The Procter & Gamble Company
    Inventors: Stephen C. Lathrop, Keith Woodruff, Edward Morris