Patents by Inventor Chao Wen Ma

Chao Wen Ma 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).

  • Publication number: 20220296029
    Abstract: A coffee or tea brewing apparatus comprising a hollow cylinder with top and bottom openings, a permeable filter, a filter retaining ring which attaches to the bottom end of the hollow cylinder and encloses the bottom opening of the hollow cylinder with the permeable filter, a support ring to support the hollow cylinder above an open vessel, and a flexible lid. Coffee grounds or tea leaves are mixed with water inside the hollow cylinder which will then drain through the removable filter effectively separating any liquids into an open vessel while retaining undissolved solids within the hollow cylinder. The flexible lid may be used to enclose the top of the hollow cylinder and pressed on to produce a positive air pressure within the filter assembly to force the liquid through the permeable filter when a faster flow rate is desired.
    Type: Application
    Filed: January 30, 2022
    Publication date: September 22, 2022
    Inventor: Chao Wen Ma