Patents by Inventor William Du

William Du 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: 20060063126
    Abstract: An apparatus for dispensing material during a dental or endodontic procedure includes a housing having a motor with an output. A needle heating member including a chamber may receive a prefilled needle of dispensing material. A heater at least substantially surrounds the chamber for heating the material in the needle. A plunger is used to expel the material from the needle during activation of the motor. A reusable protective sheath is provided for disposition on the outside of the housing. A method of manufacturing a needle for use and dispensing a material during a dental or endodontic procedure includes drawing a blank of metal having a closed distal end, bending the blank at a desired angle, and removing a portion of the drawn metal from the distal end to open the distal end thereby forming the dispensing needle.
    Type: Application
    Filed: September 16, 2005
    Publication date: March 23, 2006
    Inventors: Carlos Aloise, William Du, L. Buchanan, Steven Benson, Brenton Lively, Gary Garman
  • Patent number: 6319477
    Abstract: The present invention is a oxygen generating device which comprises: a container having a mouth and a neck surrounding the mouth; a tank which has an annual flange for establishing a gas tight seal between the tank and the neck; a dome assembly which is engageable with the neck and extends upwardly to define a dome chamber above the neck; and means for permitting oxygen generated in the tank to flow into the dome chamber by bubbling through a liquid contained in the dome base; the dome base having an outlet connection through which oxygen can leave the chamber and where at least part of the dome is transparent so as to render the inside thereof visible from the outside of the dome.
    Type: Grant
    Filed: January 29, 1999
    Date of Patent: November 20, 2001
    Assignee: Advent Aerobe Ltd.
    Inventor: William Du Toit
  • Patent number: 5722445
    Abstract: An improved multi-purposed cane including a handle and a stick attached to the root portion of the handle. The handle is integrally configured defining a receiving chamber extending horizontally and longitudinally. In the left half portion of the receiving chamber, an electrical components set is attached and retained thereof. The electrical components set includes a battery cell, a printed circuit board, a lamp, a push button switch, and a warning light disposed at the rear portion of the receiving chamber. The improved features is the bottom portion of the battery cell which is provided with a recess corresponding to the root portion of the handle. The root portion of the handle defines vertically an inner chamber having a clipping element thereof. The clipping element includes a biasing post, a compression spring and a cap button. The cap button is received in the recess and its top is projected into the receiving chamber.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: March 3, 1998
    Inventors: Shyu Shing Hae, William Du
  • Patent number: 5582196
    Abstract: A multipurpose cane which includes a hollow handle, and a retractable walking-stick fixedly secured to the hollow handle fixe, wherein the hollow handle defines a storage chamber for keeping personal accessories, and holds a lamp and battery assembly controlled by a switch to produce light for illumination and/or warning.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: December 10, 1996
    Inventors: Shyu S. Hae, William Du
  • Patent number: 4412841
    Abstract: Compacted carbonaceous shapes are produced by mixing a particulate carbonaceous material with a binder, forming green shapes from the mixture, and heating the green shapes by induction heating or microwave heating or a combination thereof. The process is particularly adapted for making formcoke.
    Type: Grant
    Filed: June 29, 1981
    Date of Patent: November 1, 1983
    Assignee: Inland Steel Company
    Inventors: William Du Broff, George H. Craig, Timothy A. Veslocki