US2937940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective stripping of electroplated metals
Assignee: Eltex Chemical Corp
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Filing: 1957-07-01
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Granted: 1960-05-24
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Expires: 1977-07-01
Abstract
No abstract record available.
Inventors
- 👤 Weisberg Mark
- 👤 Florence P Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:56
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A COMPOSITION FOR SELECTIVELY DISSOLVING NICKEL, COLBALT, AND ALLOYS THEREOF DEPOSITED ON A BASIS METAL, WHICH COMPOSITION CONSISTS ESSENTIALLY OF AN INGREDIENT SELECTED FROM EACH OF THE FOLLOWING GROUPS, (A) AND (B), (A) NITRO-SUBSTITUTED AROMATIC COMPOUNDS CONTAINING AT LEAST ONE NO2 ATTACHED TO A BENZENE RING WHICH ALSO CARRIES A RADICAL HAVING A WATER-SOLUBILIZING EFFECT ON THE NITRO-SUBSTITUED AROMATIC COMPOUND AND WATER SOLUBLE NITRO-SUBSTITUED ALIPHATIC COMPOUNDS AND THOSE WHICH HAVE A WATER SOLUBILIZING GROUP ATTACHED THERETO, AND (B) PRIMARY AND SECONDARY AMINES, AND TERTIARY AMINES HAVING COMPARBLE ALKALINITY TO SAID PRIMARY AND SECONDARY AMINES, THE SAID COMPOSITION BEING IN THE LIQUID PHASE, CONTAINING AT LEAST 0.01 PERCENT BY WEIGHT OF THE COMBINATION OF NITRO-CONTAINING COMPOUND AND AMINE, IN A RATIO AT LEAST 1 PART NITRO-CONTAINING COMPOUND TO 50 PARTS OF THE AMINE-CONTAINING COMPOUND AND NOT EXCEEDING 9 PARTS OF NITRO COMPOUND TO 1 PART AMINE.
Claim 2
Dependent Claim
145 words
A COMPOSITION FOR SELECTIVELY DISSOLVING NICKEL, COLBALT, AND ALLOYS THEREOF DEPOSITED ON A BASIS METAL, WHICH COMPOSITION CONSISTS ESSENTIALLY OF AN INGREDIENT SELECTED FROM EACH OF THE FOLLOWING GROUPS, (A) AND (B), (A) NITRO-SUBSTITUTED AROMATIC COMPOUNDS CONTAINING AT LEAST ONE NO2 ATTACHED TO A BENZENE RING WHICH ALSO CARRIES A RADICAL HAVING A WATER-SOLUBILIZING EFFECT ON THE NITRO-SUBSTITUED AROMATIC COMPOUND AND WATER SOLUBLE NITRO-SUBSTITUED ALIPHATIC COMPOUNDS AND THOSE WHICH HAVE A WATER SOLUBILIZING GROUP ATTACHED THERETO, AND (B) PRIMARY AND SECONDARY AMINES, AND TERTIARY AMINES HAVING COMPARBLE ALKALINITY TO SAID PRIMARY AND SECONDARY AMINES, THE SAID COMPOSITION BEING IN THE LIQUID PHASE, CONTAINING AT LEAST 0.01 PERCENT BY WEIGHT OF THE COMBINATION OF NITRO-CONTAINING COMPOUND AND AMINE, IN A RATIO AT LEAST 1 PART NITRO-CONTAINING COMPOUND TO 50 PARTS OF THE AMINE-CONTAINING COMPOUND AND NOT EXCEEDING 9 PARTS OF NITRO COMPOUND TO 1 PART AMINE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-24 | 1963-11-23 | 1964-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-24 | 1967-11-23 | 1968-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-24 | 1971-11-23 | 1972-05-24 | $7700.00 | Window Closed / Lapsed |