Patents by Inventor Yong F. Chen

Yong F. Chen 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: 4776352
    Abstract: A disposable ashtray made of flame-resistant and/or fire-retardant treated paper comprising two substantically identical sheets bonded together along matching outer contours to define an inner space when said sheets are oppositely pulled. The upper section of both sheets are perforated and enclose at least one ply of an interposed smoke absorbing layer. The lower section of least one of the sheets has at least one mouth-like opening having an integral flapped tongue as a holding platform for an in-use cigarette. In addition, a holder stand for keeping the ashtray upright and stable at an expanded position.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: October 11, 1988
    Inventor: Yong F. Chen