Patents by Inventor David L. Archer

David L. Archer 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).

  • Process for recovering boron trifluoride from a catalyst complex
    Patent number: 6410812
    Abstract: In a process for the oligomerization of alpha olefins using a boron trifluoride/alcohol catalyst complex a method for recovering the boron trifluoride from the product stream which comprises lowering the pressure of the product stream to flash off excess boron trifluoride, mixing the boron trifluoride with fresh alcohol to form fresh boron trifluoride/alcohol catalyst complex, and introducing the fresh catalyst back into the oligomerization reactor.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: June 25, 2002
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Kenneth D. Hope, Ting C. Ho, David L. Archer, Russell J. Bak, J. Barry Collins, Doug W. Burns
  • Phase locked loop arrangement
    Patent number: 5255293
    Abstract: The invention can be used to extract information in a Synchronous Digital Hierarchy (SDH) transmission system and relates to the extraction of information from a PCM data stream. It is desirable to provide a Dual Filtering Method for a System having dual data rate justification in a simple manner using minimum components. To obtain a relatively simple circuitry a single controlled oscillator source is used to time the data output stream.
    Type: Grant
    Filed: March 5, 1991
    Date of Patent: October 19, 1993
    Assignee: Alcatel N.V.
    Inventors: David L. Archer, Timothy C. Rayner
  • Method of mounting lead frame on substrate
    Patent number: 5136779
    Abstract: A lead frame for orienting and then mounting a plurality of clip leads on a semi-conductor device or substrate and method.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: August 11, 1992
    Assignee: Die Tech, Inc.
    Inventors: Baron E. Abel, David L. Archer
  • Lead frame for semi-conductor device
    Patent number: 5057901
    Abstract: A lead frame for orienting and then mounting a plurality of clip leads on a semi-conductor device or substrate and method.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: October 15, 1991
    Assignee: Die Tech, Inc.
    Inventors: Baron E. Abel, David L. Archer