Patents by Inventor Samuel V. Bristol

Samuel V. Bristol 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).

  • Low residue water-based soldering flux and process for soldering with same
    Patent number: 5507882
    Abstract: Low residue water-based soldering flux, and process and system for using the same. The flux includes a mixture of succinic, glutaric and adipic acid in water, and optionally a wetting agent. The flux is applied to a surface to be soldered. The flux is dried. The surface is soldered. The flux is applied at an application station, dried at a drying station and soldered at a soldering station.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: April 16, 1996
    Assignee: Delco Electronics Corporation
    Inventors: Samuel V. Bristol, Eugene H. Hanaway, Delbert R. Walls
  • Low residue soldering flux
    Patent number: 5004509
    Abstract: A low residue soldering flux contains a non-subliming dibasic acid mixture of by weight about 15-30% succinic acid, 40-63% glutaric acid and 10-30% adipic acid, e.g., in a volatilizable organic solvent, formed as a rosin-containing or rosin-free flux. The dibasic acid mixture is capable of volatilizing during heat soldering to leave a soldered product (e.g., an electronic circuit board) essentially free from corrosion-promoting ionic residue. This eliminates the need for a residue-removing washing step.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: April 2, 1991
    Assignee: Delco Electronics Corporation
    Inventor: Samuel V. Bristol