Metal finishing alloy of nickel-copperphosphorus
Abstract
Abstract THIS INVENTION RELATES TO A NEW METAL COATING USEFUL AS A PROTECTIVE AND DECORATIVE FINISH WHICH FINISH ALSO HAS UNUSUAL FUNCTIONAL PROPERTIES AND TO A METAL PLATING SOLUTION CAPABLE OF DEPOSITING SAID COATING. THE COATING IS AN ELECTROLESS NICKEL COPPER-PHOSPHORUS ALLOY SUBSTANTIALLY FREE OF-CO-DEPOSITED SULFUR WHICH COATING IS DEPOSITED FROM AN ELECTROLESS NICKEL SOLUTION CHARACTERIZED BY THE PRESENCE OF A SMALL AMOUNT OF COPPER IONS. THE COPPER IONS PROVIDE AN XTREMELY SMOOTH DEPOSIT RESULTING IN A LUSTROUS SURFACE APPEARANCE, MOREOVER, COPPER IONS IN THE MONOVALENT CURPOUS STATE, ADDED TO THE ELECTROLESS NICKEL SOLUTION, PROVIDE THE SECONDARY ADVANTAGES OF STABILIZING THE PLATING SOLUTION AND SUBSTANTIALLY IMPROVING CORROSION RESISTANCE OF THE DEPOSIT. COPPER IONS IN EITHER THE MONOVALENT CUPROUS STATE OR THE DIVALENT CUPRIC STATE ADDED TO THE ELECTROLESS NICKEL SOLUTION CO-DEPOSIT WITH THE NICKEL PROVIDING THE ELECTROLESS ALLOY DEPOSIT OF NICKEL, PHOSPHORUS AND COPPER.
Inventors
- 👤 M Gulla
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |