Patents by Inventor David Patrick Duckworth

David Patrick Duckworth 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).

  • Intergland grease
    Patent number: 10113366
    Abstract: The present disclosure relates to an intergland grease formed from a base grease and a lubricating intergland grease additive, such as PTFE or a lubricating liquid polymer, such as polybutene. The present disclosure further relates to a roller cone drill bit including such an intergland grease.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: October 30, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventor: David Patrick Duckworth
  • INTERGLAND GREASE
    Publication number: 20160290053
    Abstract: The present disclosure relates to an intergland grease formed from a base grease and a lubricating intergland grease additive, such as PTFE or a lubricating liquid polymer, such as polybutene. The present disclosure further relates to a roller cone drill bit including such an intergland grease.
    Type: Application
    Filed: December 11, 2013
    Publication date: October 6, 2016
    Applicant: HALLIBURTON ENERGY SERVICES INC.
    Inventor: David Patrick Duckworth