Patents by Inventor Roger Francis Bernards

Roger Francis Bernards 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).

  • Additives to stop copper attack by alkaline etching agents such as ammonia and monoethanol amine (MEA)
    Patent number: 7211204
    Abstract: A corrosive composition, such as an alkaline aqueous carbon dispersion, a cleaner, a cleaner conditioner, or a conditioner, comprises a corrosion inhibitor, e.g., benzotriazole. The corrosion inhibitor is present in an amount effective to reduce or stop the dissolution of metal from a metallic surface, such as a printed circuit board, in contact with the composition. A method to reduce or stop the dissolution of metal from a metallic surface in contact with a corrosive composition, and a method to stabilize or recover a corrosive composition containing metal contaminants by adding an effective amount of a corrosion inhibitor to the corrosive composition.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: May 1, 2007
    Assignee: Electrochemicals, Inc.
    Inventors: Roger Francis Bernards, Beth Ann LaFayette, Thao Pham