Patents by Inventor John H. Welsh

John H. Welsh 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).

  • Capsule for use in preparing a dental amalgam
    Patent number: 6439380
    Abstract: In one aspect of the invention, a dental amalgam capsule includes a body, a cap, a dental amalgam alloy, and mercury. In further detail, the body has a hollow interior with an open first end which includes an opening surrounded by an end wall. The cap has a hollow interior with an open first end and an interior surface. The interior surface includes an annular recess disposed about a longitudinal axis of the cap, with the annular recess including a sealing surface angled at less than 90 degrees relative to the longitudinal axis. The sealing surface is capable of contacting at least a portion of the end wall, thereby forming a seal with the end wall.
    Type: Grant
    Filed: October 10, 2001
    Date of Patent: August 27, 2002
    Assignee: Kerr Corporation
    Inventor: John H. Welsh
  • Capsule for use in preparing a dental amalgam
    Patent number: 6360886
    Abstract: In one aspect of the invention, a dental amalgam capsule includes a body, a cap, a dental amalgam alloy, and mercury. In further detail, the body has a hollow interior with an open first end which includes an opening surrounded by an end wall. The cap has a hollow interior with an open first end and an interior surface. The interior surface includes an annular recess disposed about a longitudinal axis of the cap, with the annular recess including a sealing surface angled at less than 90 degrees relative to the longitudinal axis. The sealing surface is capable of contacting at least a portion of the end wall, thereby forming a seal with the end wall.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: March 26, 2002
    Assignee: Kerr Corporation
    Inventor: John H. Welsh
  • Capsule for use in preparing a dental amalgam
    Publication number: 20020027087
    Abstract: In one aspect of the invention, a dental amalgam capsule includes a body, a cap, a dental amalgam alloy, and mercury. In further detail, the body has a hollow interior with an open first end which includes an opening surrounded by an end wall. The cap has a hollow interior with an open first end and an interior surface. The interior surface includes an annular recess disposed about a longitudinal axis of the cap, with the annular recess including a sealing surface angled at less than 90 degrees relative to the longitudinal axis. The sealing surface is capable of contacting at least a portion of the end wall, thereby forming a seal with the end wall.
    Type: Application
    Filed: October 10, 2001
    Publication date: March 7, 2002
    Applicant: Kerr Corporation
    Inventor: John H. Welsh