Patents by Inventor Andrew Murray Lichkus

Andrew Murray Lichkus 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).

  • ORTHODONTIC BRACKET WITH CONTROLLED ADHESIVE FLOW
    Publication number: 20170086946
    Abstract: An orthodontic bracket (10) of the type to be bonded to a patient's tooth has a base (22) and a side proximal (20) to a patient's tooth when positioned thereon. Proximal side (20) is provided with flow path regulating structures (30) that define a prescribed flow path for bonding material (32) when the bracket (10) is pressed to a tooth. Areas (40, 50) are provided as catchments for excess bonding material to thereby reduce the occurrence of flash.
    Type: Application
    Filed: September 30, 2015
    Publication date: March 30, 2017
    Inventors: Tieming RUAN, Sivaramakrishnan KRISHNAMOORTHY, Andrew Murray LICHKUS
  • Low shrinkage dental material and method
    Patent number: 8067481
    Abstract: The invention provides a low polymerization shrinkage dental composition and a polymerizable dental material selected from the group consisting of wax-like dental material that undergoes ring open polymerization. The dental composition is useful as restorative material and for making artificial teeth, dentures, restoratives, crowns and bridges of high strength dental polymeric material.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: November 29, 2011
    Assignee: Dentsply International, Inc.
    Inventors: Benjamin Jiemin Sun, Andrew Murray Lichkus
  • Low shrinkage dental material and method
    Publication number: 20100286435
    Abstract: The invention provides a low polymerization shrinkage dental composition and a polymerizable dental material selected from the group consisting of wax-like dental material that undergoes ring open polymerization. The dental composition is useful as restorative material and for making artificial teeth, dentures, restoratives, crowns and bridges of high strength dental polymeric material.
    Type: Application
    Filed: September 4, 2008
    Publication date: November 11, 2010
    Inventors: Benjamin Jiemin Sun, Andrew Murray Lichkus
  • Method for the production of polyglycolic acid
    Patent number: 6150497
    Abstract: A method for the production of polyglycolic acid polymer useful in the manufacture of sutures, meshes, gauzes, molded clips and like medical articles.
    Type: Grant
    Filed: January 13, 1999
    Date of Patent: November 21, 2000
    Assignee: Sherwood Services AG
    Inventors: Bommakanti Bala Subrahmanya Sastry, Andrew Murray Lichkus
  • Dual capillary fiber coating process
    Patent number: 5989621
    Abstract: A method for coating surgical fibers and surgical braids employing dual capillaries (10) in series. After the fiber (50) or braid is initially coated with a t-guide capillary (16), the fiber (50) or braid is dried using forced air within an enclosure (66) and then coated a second time by the second capillary (14), a v-guide capillary (52).
    Type: Grant
    Filed: February 23, 1998
    Date of Patent: November 23, 1999
    Assignee: Sherwood Services AG
    Inventors: Andrew Murray Lichkus, Virginia Eleanor Schmidt