Patents by Inventor Yuan-Shin Liu

Yuan-Shin Liu 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: 5397051
    Abstract: The present invention relates to a paper-made cake box which includes a lower seat and a corresponding upper cover. Both the lower seat and the upper cover are formed from a paper board made of pure fiber and additives laminated to an adequate thickness and coated with polyethylene to meet the FDA regulations. The paper board for the lower seat is cut to a substantially circular or polygonal shape and embossed with folding lines which define a polygonal bottom section and several wall sections adjoining the bottom section at the folding lines. Each of the wall sections is divided by two parallel folding lines into an inner wall section, an outer wall section and a flange section.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: March 14, 1995
    Inventors: Yuan-Shin Liu, Richard C. H. Chang
  • Patent number: 5351879
    Abstract: A paper food container is disclosed having a bottom flange and formed form a paper board blank. The blank has a predetermined thickness and is cut into a predetermined pattern. Since the container will accommodate food products, the paper board is made of pure fiber and additives meeting FDA regulations. The blank is coated with polyethylene and laminated to an adequate thickness. The paper board is further embossed with folding lines so that the paper board can be folded about the folding lines and heat-sealed to form a bowl-like paper food container having a bottom formed with a flange which reinforces the paper food container and permits a user to securely hold the paper food container without being burned by the heat of the hot food contained in the paper food container.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: October 4, 1994
    Inventors: Yuan-Shin Liu, Richard C. H. Chang
  • Patent number: 5326017
    Abstract: A paper container with multiple compartments partitioned by walls in different heights, which is formed from a paper board of adequate thickness cut into a predetermined pattern. The paper board is made of paper of pure fibers and additives, laminated to adequate thickness and coated with polyethylene to meet the FDA regulations. The paper board is further formed with a middle opening and embossed with several separate folding lines to define several bottom sections located around the middle opening, partitioning wall sections adjoining the bottom sections, front, rear and lateral wall sections also adjoining the bottom sections, each two partitioning wall sections adjoin each other at one of the folding lines while the front, rear and lateral wall sections are free from connection with other wall sections of the paper board and adjoin several top edge strip sections.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: July 5, 1994
    Inventors: Yuan-Shin Liu, Richard C. H. Chang