Patents by Inventor Arthur H. Graham

Arthur H. Graham 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).

  • Alloy coatings for electrical contacts
    Patent number: 4849303
    Abstract: A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is achieved by adding at least about 15 parts per million of iodide and/or iodate ions to the plating bath. The as-plated alloy has a thin surface layer which contains iodide at or near the surface.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: July 18, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arthur H. Graham, Kenneth B. Keating
  • Electroplating bath and process for maintaining plated alloy composition stable
    Patent number: 4846941
    Abstract: A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is achieved by adding at least about 15 parts per million of iodate ions to the plating bath.
    Type: Grant
    Filed: April 1, 1988
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arthur H. Graham, Kenneth B. Keating
  • Electroplating bath and process for maintaining plated alloy composition stable
    Patent number: 4743346
    Abstract: A plating bath and process for electroplating coatings of palladium nickel alloys on a conductive substrate at current densities in the range of 10 amps/sq. ft. to 150 amps/sq. ft. wherein the palladium content of the alloy remains substantially constant despite current density variations during plating. The alloy composition stability is acheived by adding at least about 15 parts per million of iodide ions to the plating bath.
    Type: Grant
    Filed: July 1, 1986
    Date of Patent: May 10, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arthur H. Graham, Kenneth B. Keating
  • Method for concomitant particulate diamond deposition in electroless plating, and the product thereof
    Patent number: RE33767
    Abstract: This invention is a method for depositing on an article a coating containing at least one member of the group metals and metal alloys plus particulate dispersed diamond comprising contacting the surface of the article with a stable electroless plating bath consisting essentially of an aqueous solution of soluble constituents of the group, electroless reducing agent therefor, a suspension of diamond particles therein and a stabilizer, and maintaining the diamond particles in suspension throughout the bath during the coating of the article for a time sufficient to produce a preselected depth of coating on the article, and the coated article pe se.This is a reissue of a patent which was the subject of a reexamination certificate No. B1 Re. 29,285, dated July 5, 1983, Request No. 90/000,120, Dec. 3, 1981.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: December 10, 1991
    Assignee: Surface Technology, Inc.
    Inventors: Theodore P. Christini, Albert L. Eustice, Arthur H. Graham