US2787590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroplating bath purification
Assignee: SEL REX PRECIOUS METALS Inc
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Filing: 1954-06-15
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Granted: 1957-04-02
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Expires: 1974-06-15
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Rinker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:10
CPC Classifications
C; C25; C25D; C25D21/00; C25D21/16; C25D21/18; Y; Y10; Y10S; Y10S204/00; Y10S204/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE PROCESS OF IMPURIFYING AN ELECTROPLATING BATH OF THE CYANIDE TYPE THE STEPS COMPRISING, PROVIDING A COMPLEX SALT OF THE CYANIDES OF BARIUM AND THE METAL TO BE PLATED, ADDING THE SALT TO THE BATH LIQUID IN PROPORTIONS SUFFICIENT TO REMOVE A SUBSTANTIAL PROPORTION OF THE UNDESIRED ANIONS THEREFROM WHEREBY TO PRECIPITATE BARIUM SALTS OF SAID ANIONS WITHOUT ADDING TO THE FREE CYANIDE CONTENT OF SAID BATH, AND SEPARATING THE PRECIPITATE FROM THE REMAINDER OF THE BATH.
Claim 2
Dependent Claim
78 words
IN THE PROCESS OF IMPURIFYING AN ELECTROPLATING BATH OF THE CYANIDE TYPE THE STEPS COMPRISING, PROVIDING A COMPLEX SALT OF THE CYANIDES OF BARIUM AND THE METAL TO BE PLATED, ADDING THE SALT TO THE BATH LIQUID IN PROPORTIONS SUFFICIENT TO REMOVE A SUBSTANTIAL PROPORTION OF THE UNDESIRED ANIONS THEREFROM WHEREBY TO PRECIPITATE BARIUM SALTS OF SAID ANIONS WITHOUT ADDING TO THE FREE CYANIDE CONTENT OF SAID BATH, AND SEPARATING THE PRECIPITATE FROM THE REMAINDER OF THE BATH.
References Cited (Backward Citations)
US2434191A
Cited
GB694893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |