Patent US2842487A successfully refreshed from Google Patents.
US2842487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing dull electronickel
Assignee: BART LAB CO Inc
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Filing: 1957-09-12
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Granted: 1958-07-08
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Expires: 1977-09-12
Abstract
No abstract record available.
Inventors
- 👤 Dodd S Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:27
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
AN AQUEOUS ACID, ELECTROPLATING BATH WHICH COMPRISES IN THE AQUEOUS MEDIUM A NICKEL ION YIELDING MATERIAL TOGETHER WITH A REAGENT SELECTED FROM THE GROUP WHICH CONSISTS OF ORTHO-FORMYLBENZENESULFONIC ACID HAVING NOT MORE THAN TWO SULFONATE GROUPS IN THE BENZENE RING AND THE SALTS OF ORTHO-FORMYLBENZENESULFONIC ACID ADDED IN AN AMOUNT LESS THAN 1% BY WEIGHT OF THE SOLIDS PRESENT IN THE ELECTROLYTE AND SUFFICIENT TO OBTAIN UPON ELECTROLYZING OF THE BATH AT A TEMPERATURE OF ABOUT 130*F. AND AT CURRENT DENSITIES EXTENDING SIMULTANEOUSLY OVER A FOURFOLD RANGE OF THE ORDER OF 35 TO 140 AMPERES PER SQUARE FOOT A DULL NICKEL DEPOSIT WITH RESIDUAL COMPRESSIVE STRESS AND A HARDNESS RANGING FROM 440-710 VICKERS AS MEASURED WITH A 1 KILOGRAM LOAD WITH A SURFACE HAVING A DULL, SATINY FINISH AND A ROUGHNESS RMS OF MATERIALLY MORE THAN TWO MICROINCHES.
Claim 2
Dependent Claim
138 words
AN AQUEOUS ACID, ELECTROPLATING BATH WHICH COMPRISES IN THE AQUEOUS MEDIUM A NICKEL ION YIELDING MATERIAL TOGETHER WITH A REAGENT SELECTED FROM THE GROUP WHICH CONSISTS OF ORTHO-FORMYLBENZENESULFONIC ACID HAVING NOT MORE THAN TWO SULFONATE GROUPS IN THE BENZENE RING AND THE SALTS OF ORTHO-FORMYLBENZENESULFONIC ACID ADDED IN AN AMOUNT LESS THAN 1% BY WEIGHT OF THE SOLIDS PRESENT IN THE ELECTROLYTE AND SUFFICIENT TO OBTAIN UPON ELECTROLYZING OF THE BATH AT A TEMPERATURE OF ABOUT 130*F. AND AT CURRENT DENSITIES EXTENDING SIMULTANEOUSLY OVER A FOURFOLD RANGE OF THE ORDER OF 35 TO 140 AMPERES PER SQUARE FOOT A DULL NICKEL DEPOSIT WITH RESIDUAL COMPRESSIVE STRESS AND A HARDNESS RANGING FROM 440-710 VICKERS AS MEASURED WITH A 1 KILOGRAM LOAD WITH A SURFACE HAVING A DULL, SATINY FINISH AND A ROUGHNESS RMS OF MATERIALLY MORE THAN TWO MICROINCHES.
References Cited (Backward Citations)
US2409119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |