Patents Assigned to Lamerie, N.V.
  • Patent number: 4999054
    Abstract: Non-toxic, non-electrolytic solutions, creams and immersion baths are provided for gold plating metallic items such as silver, copper, nickel, brass and gold alloys, as well as silver plated or gold plated items. Water soluble gold salts are used, together with reducing compounds. Water soluble gold salts can also be used with complexing compounds and stabilizers. For convenience, the gold plating ingredients may be combined with salts to form tablets or powders. Addition of water to the tablets or powder provides the novel solutions and immersion baths. The ingredients can also be reached with the metallic item in the presence of a metallic reaction enhancer. The amount of gold generating compound in the solutions and creams is selected to either replenish or maintain the amount of gold on an item which already has a gold surface.
    Type: Grant
    Filed: December 8, 1987
    Date of Patent: March 12, 1991
    Assignee: Lamerie, N.V.
    Inventors: Lawrence M. Perovetz, Nagendra N. Bhattacharya
  • Patent number: 4925491
    Abstract: Non-toxic solutions are provided to silver plate metallic items and previously silver plated items. Solutions and creams are also provided which simultaneously silver plate and polish such items. The amount of silver generating compound is selected to either maintain or replenish the amount of silver plating on the items. Solutions are also provided to prevent staining during the silver plating and polishing.
    Type: Grant
    Filed: March 10, 1987
    Date of Patent: May 15, 1990
    Assignee: Lamerie, N.V.
    Inventors: Lawrence M. Perovetz, Jack Pickthall, deceased, Terence Pickthall, executor
  • Patent number: 4832743
    Abstract: Non-toxic, non-electrolytic solutions, creams and immersion baths are provided for gold plating metallic items such as silver, copper, nickel, brass and gold alloys, as well as silver plated or gold plated items. Water soluble gold salts are used, together with reducing compounds. For convenience, the gold plating ingredients may be combined with salts to form tablets or powders. Addition of water to the tablets or powder provides the novel solutions and immersion baths. The amount of gold generating compound in the solutions and creams is selected to either replenish or maintain the amount of gold on an item which already has a gold surface.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: May 23, 1989
    Assignee: Lamerie, N.V.
    Inventors: Lawrence M. Perovetz, Jack Pickthall, deceased, by Terence Pickthall, executor
  • Patent number: 4798626
    Abstract: Non-toxic solutions and creams are provided which simultaneously silver plate and polish metallic items and previously silver plated items. The amount of silver generating compound is selected to either maintain or replenish the amount of silver plating on the items. Solutions are also provided to prevent staining during the silver plating and polishing.
    Type: Grant
    Filed: September 30, 1986
    Date of Patent: January 17, 1989
    Assignee: Lamerie, N.V.
    Inventors: Lawrence M. Perovetz, Jack Pickthall, deceased, by Terence Pickthall, executor