Patent US2737484A successfully refreshed from Google Patents.
US2737484A
Expired / Lapsed
US
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Bright nickel plating
Assignee: United Chromium Inc
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Filing: 1952-10-31
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Granted: 1956-03-06
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Expires: 1972-10-31
Abstract
No abstract record available.
Inventors
- 👤 Passal Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:41
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/14; C25D3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
IN AN AQUEOUS ACIDIC BATH SOLUTION FOR BRIGHT NICKEL PLATING CONTAINING AT LEAST ONE NICKEL SALT AS THE SOURCE OF THE NICKEL AND A SUBSTITUTED AROMATIC COMPOUND AS A SECONDARY BRIGHTENER IN WHICH SAID SUBSTITUENT COMPRISES AN -SO2 CONTAINING MOIETY WITH THE S ATOM LINKED TO THE AROMATIC MOIETY, THE COMBINATION THEREWITH AS A PRIMARY BRIGHTENER OF ABOUT 0.001 TO ABOUT 0.05 G./1. OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF 2-MERCAPTO-BENZIMIDAZOLE AND 2-MERCAPTO-BENZIMIDAZOLE SUBSTITUTED BY A RADICAL HAVING A NON-METALLIC ATOM WHICH IS DIRECTLY CONNECTED TO THE MERCAPTO COMPOUND AND WHICH IS SELECTED FROM THE CLASS CONSISTING OF NITROGEN AND CARBON.
Claim 2
Dependent Claim
103 words
IN AN AQUEOUS ACIDIC BATH SOLUTION FOR BRIGHT NICKEL PLATING CONTAINING AT LEAST ONE NICKEL SALT AS THE SOURCE OF THE NICKEL AND A SUBSTITUTED AROMATIC COMPOUND AS A SECONDARY BRIGHTENER IN WHICH SAID SUBSTITUENT COMPRISES AN -SO2 CONTAINING MOIETY WITH THE S ATOM LINKED TO THE AROMATIC MOIETY, THE COMBINATION THEREWITH AS A PRIMARY BRIGHTENER OF ABOUT 0.001 TO ABOUT 0.05 G./1. OF A COMPOUND SELECTED FROM THE CLASS CONSISTING OF 2-MERCAPTO-BENZIMIDAZOLE AND 2-MERCAPTO-BENZIMIDAZOLE SUBSTITUTED BY A RADICAL HAVING A NON-METALLIC ATOM WHICH IS DIRECTLY CONNECTED TO THE MERCAPTO COMPOUND AND WHICH IS SELECTED FROM THE CLASS CONSISTING OF NITROGEN AND CARBON.
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |