Patents by Inventor Preston Cothren

Preston Cothren 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).

  • Integral expanded upset
    Patent number: 11473702
    Abstract: An improved upset connection for use in the oilfield having an external upset integral connection improving on the existing standard connections, wherein a standard upset connection is expanded creating internal and external shoulders at both the male and female connections, and wherein the external shoulder at the female connection also has an external bevel.
    Type: Grant
    Filed: April 10, 2020
    Date of Patent: October 18, 2022
    Assignee: BENOIT PREMIUM THREADING, LLC
    Inventors: Jonathan Hoffstadt, Preston Cothren, Danny Boquet