Patents by Inventor Sophia I. de Castro

Sophia I. de Castro 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).

  • Grip enhancer for footwear
    Patent number: 11576469
    Abstract: A cap for capping an upper surface of a shoe a first layer, a second layer, and a third layer. The first layer has an outer surface that has a coefficient of friction that is greater than that of the upper surface of the shoe that that the cap caps. The second layer is an adhesive layer. Third layer is a release layer that can be peeled off the adhesive layer to expose it, thereby enabling said adhesive layer to stick to said shoe.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: February 14, 2023
    Assignee: Terraignota Ventures, LLC
    Inventors: Sophia I. de Castro, José Tadeo V. de Castro
  • GRIP ENHANCER FOR FOOTWEAR
    Publication number: 20200205525
    Abstract: A cap for capping an upper surface of a shoe a first layer, a second layer, and a third layer. The first layer has an outer surface that has a coefficient of friction that is greater than that of the upper surface of the shoe that that the cap caps. The second layer is an adhesive layer. Third layer is a release layer that can be peeled off the adhesive layer to expose it, thereby enabling said adhesive layer to stick to said shoe.
    Type: Application
    Filed: December 23, 2019
    Publication date: July 2, 2020
    Inventors: Sophia I. de Castro, Jose Tadeo V. de Castro