Patents by Inventor Frank Z Xia

Frank Z Xia 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: 6793076
    Abstract: A glass bottle protective enclosure (10) designed to protect a glass bottle (100) in the event the bottle is subjected to an impact shock. The enclosure is provided with a leak-proof seal and is particularly adapted for protecting glass bottles (100) containing toxic injectable medication. The enclosure (10), which is preferably made from a transparent plastic, consists of a lower bottle container (12) which includes a base (14) and a plurality of shock absorbing protrusions (30), which are located to allow a bottle label to be clearly visible, on the base (14) is located at least one sensor cavity (120) into which is inserted an enclosure leakage sensor (122) consisting of either a water soluble sensor (124) or an electronic sensor (126). Both of which provide an indication if a bottle leakage occurs. To complete the enclosure (10) the container (12) includes a threaded bottle container cap (36) which includes a plurality of cap shock absorbing protrusions (52).
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: September 21, 2004
    Assignee: Amphastar Pharmaceuticals, Inc.
    Inventors: Mary Ziping Luo, Jack Yongfeng Zhang, Frank Z. Xia, Rong Zhou, Denny R. S. Ko
  • Patent number: 6418982
    Abstract: A process of bulk filling containers which includes the steps of arranging a number of containers upside down in a tray (24) that has a raised peripheral lip (26). This tray full of containers is then placed in a vacuum chamber (28) which is then evacuated to a predetermined level below atmospheric pressure. Liquid (36) is then introduced into the tray through a reservoir (38) and conduit (40) which penetrates the wall of the vacuum chamber and the vacuum within the chamber is gradually released at a rate that draws the liquid into the containers. At this point in the process unwanted liquid is rinsed away and the tray is removed from the chamber and turned right side up. The final step is to seal the top of the containers with an appropriate cap, barrier, tip or connection. A second embodiment adds a step to the process by positioning the containers upside down in a rack (74) and positioning the rack directly above the tray containing the liquid.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: July 16, 2002
    Assignee: Amphastar Pharmaceuticals Inc.
    Inventors: Jack Y. Zhang, Mary Ziping Luo, Frank Z Xia
  • Patent number: 5205000
    Abstract: A dual water-level toilet flushing apparatus (10) that allows a toilet user to easily and quickly select either a partial or a full toilet flush. The partial flush which is normally preset is recommended for flushing liquid waste while the full flush is recommended for flushing solid waste. The apparatus (10) which is easily installed and requires no modification to the toilet water tank (60) consists of three major elements: an overflow tube sleeve (12) that attaches to an overflow tube (64) and that has swivelly attached the back end of a floating inverted pendulum (20). The front of the pendulum is attached, via a pendulum/flapper valve link (24), to the front of a toilet flapper valve (30) having its back swivelly attached to the bottom of the overflow tube (64). To effect a partial flush, the toilet flush handle (68) is depressed and immediately released; to effect a full flush the handle (60) is depressed and held for a few seconds.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: April 27, 1993
    Inventors: Frank Z. Xia, Mary Z. Luo, Jack Y. Zhang