Patent US2844530A successfully refreshed from Google Patents.
US2844530A
Expired / Lapsed
US
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Black nickel plating
Assignee: Huntington Alloys Corp
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Filing: 1957-02-15
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Granted: 1958-07-22
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Expires: 1977-02-15
Abstract
No abstract record available.
Inventors
- 👤 Wesley Waclaw Andrew
- 👤 Knapp Burton Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:34
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/12; C25D3/56; C25D3/565; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/927; Y10S428/9335; Y10S428/934; Y10S428/935; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12944
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
104 words
A PROCESS FOR ELECTRODEPOSITING ATTRACTIVE BLACK FIN ISHES ON METALLIC ARTICLES WHICH COMPRISES SUBJECTING THE ARTICLE TO BE BLACKENED TO THE ACTION OF AN AQUEOUS ELECTROPLATING SOLUTION HAVING A PH WITHIN A RANGE OF AT LEAST AS LOW AS ABOUT 2.3 AND UP TO ABOUT 5.5 AND CONTAINING FROM 7.5 G. P. L. TO ABOUT 45 G. P. L. OF AMMONIUM CHLORIDE, ABOUT 7.5 G. P. L. TO ABOUT 30 G. P. L. OF SODIUM THIOCYANATE, FROM 15 G. P. L. TO ABOUT 60 G. P. L. OF ZINC CHLORIDE, AND NICKEL CHLORIDE HEXAHYDRATE, THE NICKEL CHLORIDE HEXAHYDRATE CONCENTRATION AND CURRENT DENSITY BEING RE-
References Cited (Backward Citations)
US2679475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |