Patent US3245780A successfully refreshed from Google Patents.
US3245780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel stripping ammoniacal solution containing a nitro benzene compound
Assignee: PHILLIP A HUNT CHEMICAL Corp
•
Filing: 1961-04-13
•
Granted: 1966-04-12
•
Expires: 1981-04-13
Abstract
No abstract record available.
Inventors
- 👤 Weisberg Mark
- 👤 Florence P Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:47
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/44; C23F1/10; C23F1/14; C23F1/32; C23F1/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN AMMONIA-YIELDING COMPOSITION FOR SELECTIVELY STRIPPING NICKEL FROM A BASE METAL IN AQUEOUS ALKALINE SOLUTION, CHARACTERIZED BY ITS CONTAINING (1) A NITRO SUBSTITUTED BENZENE COMPOUND AND (2) AN AMMONIA SALT, (1) AND (2) BEING PRESENT IN MAJOR AMOUNT, (3) A SULFUR COMPOUND IN SMALL AMOUNT, WHICH SULFUR COMPOUND YIELDS AT LEAST A TRACE OF SULFIDE IONS IN AQUEOUS SOLUTION, SAID TOTAL COMPOSITION BEING SOLUBLE IN WATER, SAID COMPOSITION WHEN IN AQUEOUS SOLUTION TOGETHER WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND CAUSTIC ALKALI, BEING USEFUL FOR STRIPPING NICKEL FROM SAID BASE METAL, THE SAID TOTAL COMPOSITION CONTAINING AT LEAST ABOUT 1 PERCENT OF SAID NITRO BENZENE COMPOUND.
Claim 2
Dependent Claim
110 words
AN AMMONIA-YIELDING COMPOSITION FOR SELECTIVELY STRIPPING NICKEL FROM A BASE METAL IN AQUEOUS ALKALINE SOLUTION, CHARACTERIZED BY ITS CONTAINING (1) A NITRO SUBSTITUTED BENZENE COMPOUND AND (2) AN AMMONIA SALT, (1) AND (2) BEING PRESENT IN MAJOR AMOUNT, (3) A SULFUR COMPOUND IN SMALL AMOUNT, WHICH SULFUR COMPOUND YIELDS AT LEAST A TRACE OF SULFIDE IONS IN AQUEOUS SOLUTION, SAID TOTAL COMPOSITION BEING SOLUBLE IN WATER, SAID COMPOSITION WHEN IN AQUEOUS SOLUTION TOGETHER WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF AMMONIA AND CAUSTIC ALKALI, BEING USEFUL FOR STRIPPING NICKEL FROM SAID BASE METAL, THE SAID TOTAL COMPOSITION CONTAINING AT LEAST ABOUT 1 PERCENT OF SAID NITRO BENZENE COMPOUND.
References Cited (Backward Citations)
CA576045A
Cited
US2200782A
Cited
US2670271A
Cited
US2649361A
Cited
US2694006A
Cited
US2937940A
Cited
US2915388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |