US2954289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dissolving of nickel-phosphorous alloys
Assignee: Chemplate Corp
•
Filing: 1957-02-12
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Granted: 1960-09-27
•
Expires: 1977-02-12
Abstract
No abstract record available.
Inventors
- 👤 Bert J Sherwood
- 👤 William R Hoyt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:49
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE METHOD OF STRIPPING NICKEL-PHOSPHOROUS ALLOY PLATING FROM A STEEL WORKPIECE WITHOUT ATTACKING THE BASE METAL, INCLUDING THE STEP OF: IMMERSING THE WORKPIECE IN A STRIPPING BATH CONTAINING FROM ABOUT 41.5 MOLE PERCENT TO ABOUT 68.4 MOLE PERCENT FUMING NITRIC ACID, FROM ABOUT 2.9 MOLE PERCENT TO ABOUT 24.5 MOLE PERCENT HYDROFLUORIC ACID, AND THE REMAINDER WATER.
Claim 2
Independent Claim
57 words
THE METHOD OF STRIPPING NICKEL-PHOSPHOROUS ALLOY PLATING FROM A STEEL WORKPIECE WITHOUT ATTACKING THE BASE METAL, INCLUDING THE STEP OF: IMMERSING THE WORKPIECE IN A STRIPPING BATH CONTAINING FROM ABOUT 41.5 MOLE PERCENT TO ABOUT 68.4 MOLE PERCENT FUMING NITRIC ACID, FROM ABOUT 2.9 MOLE PERCENT TO ABOUT 24.5 MOLE PERCENT HYDROFLUORIC ACID, AND THE REMAINDER WATER.
References Cited (Backward Citations)
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Cited
US1974570A
Cited
US2200486A
Cited
US2371529A
Cited
US2541083A
Cited
US2569158A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |