Patents by Inventor Francis O. Duane

Francis O. Duane 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).

  • Fluxless solder
    Patent number: 5139704
    Abstract: A fluxless solder for application to metal surfaces which include contaminants such as metal oxides. The fluxless solder includes a reducing agent which reacts with interfering metal oxides to form essentially inert compounds which require no further cleaning. Reducing agents, such as lithium, calcium, strontium and cesium are disclosed for use in lead-tin solders, in amounts ranging from about 0.5 to 10 atom percent. Various methods for forming the fluxless solder are also disclosed.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: August 18, 1992
    Assignee: Hughes Aircraft Company
    Inventors: Wilson A. Holland, William E. Elias, Francis O. Duane