Patents by Inventor Nathan Feldstein

Nathan Feldstein 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).

  • Method of applying catalysts for electroless deposition and article
    Patent number: 4082899
    Abstract: Catalytic compositions useful in the preparation of substrates prior to chemical deposition (autocatalytic plating) comprises an excess hydrolyzable stannic ion relative to stannous ions together with catalytic metal(s) and selected chemical additives. By simple adjustments, a plurality of substrates may be treated.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: April 4, 1978
    Inventor: Nathan Feldstein
  • Method of preparation and use of novel electroless plating catalysts
    Patent number: 4048354
    Abstract: A method for the formation of novel colloidal catalytic electroless plating compositions comprises admixing a highly stable non-active colloidal dispersion with an activity modifier. The mixture so formed is used in electroless plating processes wherein a pre-cleaned substrate is contacted with the novel colloidal catalytic composition, rinsed, contacted with a reducing or activating solution and then contacted with an electroless plating solution.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: September 13, 1977
    Inventor: Nathan Feldstein
  • Temperature-stable non-magnetic alloy
    Patent number: 4042382
    Abstract: An alloy composed of nickel, boron and phosphorus that does not change substantially in magnetic properties, hardness or resistivity, with substantial changes in temperature.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: August 16, 1977
    Assignee: RCA Corporation
    Inventor: Nathan Feldstein
  • Catalytic developer
    Patent number: 3993801
    Abstract: Improved processes and systems are described for the reception of electroless plating of non-metallic substrates, the processes comprising forming a coating of metal ions onto the non-metallic substrate, immersing the coated substrate in a developer solution containing ions selected from nickel, cobalt and copper ions and mixtures thereof and a reducing agent, and thereafter immersing the substrate in conventional electroless plating baths, e.g., nickel or cobalt-hypophosphite baths or a copper-formaldehyde bath.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: November 23, 1976
    Assignee: Surface Technology, Inc.
    Inventor: Nathan Feldstein
  • Electroless plating process employing non-noble metal hydrous oxide catalyst
    Patent number: 3993799
    Abstract: Metallic surfaces are imparted to non-conductive or dielectric substrates by an electroless coating process comprising coating the surface of the substrate with a hydrous oxide colloid of non-precious metal ions preferably selected from the group consisting of cobalt, nickel and copper ions, reducing the selected metal ions to a reduced or zero valence state with a suitable reducing agent, and exposing the substrate to an electroless plating bath.
    Type: Grant
    Filed: August 26, 1975
    Date of Patent: November 23, 1976
    Assignee: Surface Technology, Inc.
    Inventor: Nathan Feldstein
  • Catalytic primer
    Patent number: 3993848
    Abstract: In the electroless plating of dielectric or non-conductive substrates by first priming the surface of the substrate with aqueous solutions containing stannous and copper ions, followed by developing the substrate with a reducing agent capable of reducing the valence state of the copper ions, the substrate is contacted with a linking agent for the stannous ion either prior to or concurrently with the priming step permitting the use of lower amounts of stannous and copper ions while achieving improved plating and improved primer usefulness.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: November 23, 1976
    Assignee: Surface Technology, Inc.
    Inventor: Nathan Feldstein
  • Electroless plating
    Patent number: 3993491
    Abstract: Dielectric or non-conductive substrates are electrolessly plated by contacting the surface of the substrate with aqueous solutions containing stannous and copper ions, the solutions being alternatively combined with a single solution, followed by contacting the surface of the substrate with a reducing agent capable of reducing the valence state of the copper ions. Systems of solutions useful in the practice of the aforesaid process are also disclosed.
    Type: Grant
    Filed: November 8, 1974
    Date of Patent: November 23, 1976
    Assignee: Surface Technology, Inc.
    Inventor: Nathan Feldstein
  • Method for electrolessly depositing metals using improved sensitizer composition
    Patent number: 3982054
    Abstract: Method for autocatalytically plating a dielectric surface with a metal such as nickel, cobalt or copper comprising sensitizing the surface with a sensitizing solution comprising both divalent tin, tetravalent tin and a substance furnishing either additional chloride ion (that is, in addition to what may be present in the sensitizer compounds) or bromide ion. The method also includes treating the sensitized surface with a catalyzing solution to provide catalytic nucleating centers and plating the metal on the catalyzed surface.
    Type: Grant
    Filed: March 25, 1974
    Date of Patent: September 21, 1976
    Assignee: RCA Corporation
    Inventor: Nathan Feldstein
  • Method of making duplicates of optical or sound recordings
    Patent number: 3962495
    Abstract: Method of making duplicate copies of information recorded in an organic plastic material as minute surface relief patterns, comprising sensitizing and activating the patterned surface, depositing a thin layer of nickel or cobalt utilizing a room temperature autocatalytic deposition process, backing up the thin metal layer with a heavier electrolytic metal deposit, separating the initial nickel or cobalt surface from the plastic surface and using the metal replica to mold or press duplicate copies in a deformable plastic.
    Type: Grant
    Filed: January 2, 1975
    Date of Patent: June 8, 1976
    Assignee: RCA Corporation
    Inventor: Nathan Feldstein
  • Temperature-stable non-magnetic alloy
    Patent number: 3953654
    Abstract: An alloy composed of nickel, boron and phosphorus that does not change substantially in magnetic properties, hardness or resistivity, with substantial changes in temperature.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: April 27, 1976
    Assignee: RCA Corporation
    Inventor: Nathan Feldstein
  • Method of electroless nickel plating
    Patent number: 3946126
    Abstract: A method for the electroless deposition of nickel on a substrate without pretreatment of the substrate, in which the reducing agent is an amine borane compound, the relatively high pH is maintained with NH.sub.4 OH plus a strong alkali, and the complexing agent is pyrophosphate anion.
    Type: Grant
    Filed: April 21, 1972
    Date of Patent: March 23, 1976
    Assignee: RCA Corporation
    Inventor: Nathan Feldstein