Process for producing electrorefined nickel having controlled size
Abstract
Abstract AN IMPROVED PROCESS FOR PRODUCING ELECTROREFINED NICKEL CATHODE MATERIAL OF CONTROLLED DIMENSION AND SUBSTANTIAL THICKNESS WHEREIN THE NICKEL IS DEPOSITED UPON A SUBSTANTIALLY FLAT, PERMANENT METAL CATHODE MANDREL SUCH AS STAINLESS STEEL, AND HAVING CONDUCTIVE ISLANDS OF CONTROLLED SIZE DEFINED ON THE SURFACE THEREOF, E.G., BY THE USE OF INTERCONNECTING LINES OF NONCONDUCTIVE RESIST, FROM A NICKEL ELECTROEFINING CATHOLYTE CONTAINING CONTROLLED AMOUNTS OF SULFUR DIOXIDE AND A LEVELING AGENT TO FACILITATE ADHERENCE OF THE ELECTRODEPOSITED NICKEL UPON THE MANDREL SURFACE BY CONTROLLING THE STRESS LEVEL THEREIN TO A TENSILE VALUE NOT EXCEEDING ABOUT 6,000 POUNDS PER SQUARE INCH AND THEREAFTER STRIPPING THE NICKEL DEPOSIT FROM THE MANDREL TO RECOVER ELECTRODEPOSITED NICKEL IN SIZES CORRESPONDING TO THE ORIGINAL AREAS OF THE CONDUCTIVE ISLANDS AND TO RECOVER THE MANDREL IN A CONDITION SUITABLE FOR FURTHER PLATING.
Inventors
- 👤 Burton Bower Knapp
- 👤 Leander Ernest Cupp
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |