US2874073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of chemical nickel plating
Assignee: General American Transportation Corp
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Filing: 1957-11-07
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Granted: 1959-02-17
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Expires: 1977-11-07
Abstract
No abstract record available.
Inventors
- 👤 Donald E Metheny
- 👤 Browar Emilian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:24
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/32; C23C18/34; C23C18/36; C23C18/1601; C23C18/1617; C23C18/1619; C23C18/1621; C23C18/1625; C23C18/1633; C23C18/1675; C23C18/1676; C23C18/1683
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
209 words
THE METHOD OF CHEMICAL NICKEL PLATING COMPRISING PROVIDING A CHEMICAL NICKEL PLATING SOLUTING OF THE NICKEL CATION-HYPOPHOSPHITE ANION TYPE CONTAINING A STABILIZING AMOUNT OF LEAD ION THEREIN, PROVIDING CHAMBER DEFINED BY WALLS FORMED OF STEEL CONTAINING A HIGH CHROMIUM CONTENT, DEACTIVATING SUBSTANTIALLY PERIODICALLY THE STEEL WALLS OF SAID PLATING CHAMBER BY TREATMENT WITH A DILUTE NITRIC ACID SOLUTION, HOLDING A HOT BATH OF THE PLATING SLUTION IN SAID PLATING CHAMBER IN THE TIME INTERVALS BETWEEN SUCCESSIVE DEACTIVATIONS OF THE STEEL WALLS THREREOF, MAINTAINING THE HOT BATH HELD IN SAID PLATING CHAMBER AT A TEMPERATURE NOT IN EXCESS OF 95*C., IMMERSING WORKPIECES TO BE PLATED IN THE HOT BATH HELD IN SAID PLATING CHAMBER AND OUT-OF-CONTACT WITH THE STEEL WALLS THEREOF, SAID STABILIZING AMOUNT OF LEAD ION CONTAINED IN THE MAXIING SOLUTION BEING IN THE RANGE 1 TO 5 P. P. M. OF THE PLATING SOLUTION BY WEIGHT AND CORRESPONDING TO THE MAXIMUM LEAD ION CONCENTRATION THEREIN TAHT IS COMPATIBLE WITH BOTH A HIGH PLATING RATE OF THE HOT BATH AND COMPLETE PLATING COVERAGE OF THE WORK-PIECES, AND MAINTAINING SAID STABILIZING AMOUNT OF LEAD ION IN THE PLATING SOLUTION BY ADDING LEAD IONS THERETO AS THE PLATING OF THE WORK-PIECES PROCEEDS IN THE HOT BATH HELD IN SAID PLATING CHAMBER.
Claim 2
Independent Claim
209 words
THE METHOD OF CHEMICAL NICKEL PLATING COMPRISING PROVIDING A CHEMICAL NICKEL PLATING SOLUTING OF THE NICKEL CATION-HYPOPHOSPHITE ANION TYPE CONTAINING A STABILIZING AMOUNT OF LEAD ION THEREIN, PROVIDING CHAMBER DEFINED BY WALLS FORMED OF STEEL CONTAINING A HIGH CHROMIUM CONTENT, DEACTIVATING SUBSTANTIALLY PERIODICALLY THE STEEL WALLS OF SAID PLATING CHAMBER BY TREATMENT WITH A DILUTE NITRIC ACID SOLUTION, HOLDING A HOT BATH OF THE PLATING SLUTION IN SAID PLATING CHAMBER IN THE TIME INTERVALS BETWEEN SUCCESSIVE DEACTIVATIONS OF THE STEEL WALLS THREREOF, MAINTAINING THE HOT BATH HELD IN SAID PLATING CHAMBER AT A TEMPERATURE NOT IN EXCESS OF 95*C., IMMERSING WORKPIECES TO BE PLATED IN THE HOT BATH HELD IN SAID PLATING CHAMBER AND OUT-OF-CONTACT WITH THE STEEL WALLS THEREOF, SAID STABILIZING AMOUNT OF LEAD ION CONTAINED IN THE MAXIING SOLUTION BEING IN THE RANGE 1 TO 5 P. P. M. OF THE PLATING SOLUTION BY WEIGHT AND CORRESPONDING TO THE MAXIMUM LEAD ION CONCENTRATION THEREIN TAHT IS COMPATIBLE WITH BOTH A HIGH PLATING RATE OF THE HOT BATH AND COMPLETE PLATING COVERAGE OF THE WORK-PIECES, AND MAINTAINING SAID STABILIZING AMOUNT OF LEAD ION IN THE PLATING SOLUTION BY ADDING LEAD IONS THERETO AS THE PLATING OF THE WORK-PIECES PROCEEDS IN THE HOT BATH HELD IN SAID PLATING CHAMBER.
References Cited (Backward Citations)
US2726969A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |