Patents by Inventor Ching C. Poon

Ching C. Poon 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).

  • Batteries
    Patent number: 4190702
    Abstract: An electrical battery having unscaled dry cells enclosed in a two-part housing split along a plane that is parallel to the axes of the cells.
    Type: Grant
    Filed: August 2, 1978
    Date of Patent: February 26, 1980
    Inventors: Ching W. Pun, Ching C. Poon
  • Leak resistant dry cells
    Patent number: 4079173
    Abstract: A leak-resistant dry cell comprises a negative electrode formed by a zinc tube which is designed to be consumed when the cell voltage has fallen to e.g. 0.75 volt, a sealed bag of flexible plastics material enclosing said zinc tube and surrounded by a cylindrical jacket, a carbon positive electrode projecting through said bag and sealed thereto, and a tongue extending from the edge of the sidewall of the zinc tube through said bag in sealing relationship therewith, the tongue contacting a negative terminal of the cell.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: March 14, 1978
    Inventors: Ching W. Pun, Ching C. Poon
  • Leak-resistant dry cells
    Patent number: 4027078
    Abstract: A leak-resistant dry cell comprises a negative electrode formed by a zinc tube which is designed to be consumed when the cell voltage has fallen to e.g. 0.75 volt, a sealed bag of flexible plastics material enclosing said zinc tube and surrounded by a cylindrical jacket, a carbon positive electrode projecting through said bag and sealed thereto, and a tongue extending from the edge of the sidewall of the zinc tube through said bag in sealing relationship therewith, the tongue contacting a negative terminal of the cell.
    Type: Grant
    Filed: October 16, 1975
    Date of Patent: May 31, 1977
    Inventors: Ching W. Pun, Ching C. Poon