US2812299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic deposition of gold and gold alloys
Assignee: Birle and Co KG
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Filing: 1955-05-23
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Granted: 1957-11-05
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Expires: 1975-05-23
Abstract
No abstract record available.
Inventors
- 👤 Volk Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:14
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/48; C25D3/56; C25D3/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
IN A METHOD OF ELECTROLYTICALLY DEPOSITING A METAL SELECTED FROM THE GROUP CONSISTING OF GOLD AND GOLD ALLOYS, THE STEPS OF SUBJECTING AN AQUEOUS SOLUSTION CONTAINING AN ALKALI METAL-GOLD-CYANIDE COMPLEX TO ELECTROLYSIS IN THE PRESENCE OF AT LEAST ONE BUFFER IN AN AMOUNT SUFFICIENT TO MAINTAIN A PH OF BETWEEN 6.5 AND 7.5 DURING ELECTROLYTIC DEPOSITION OF SAID METAL FROM SAID SOLUTION.
Claim 2
Dependent Claim
62 words
IN A METHOD OF ELECTROLYTICALLY DEPOSITING A METAL SELECTED FROM THE GROUP CONSISTING OF GOLD AND GOLD ALLOYS, THE STEPS OF SUBJECTING AN AQUEOUS SOLUSTION CONTAINING AN ALKALI METAL-GOLD-CYANIDE COMPLEX TO ELECTROLYSIS IN THE PRESENCE OF AT LEAST ONE BUFFER IN AN AMOUNT SUFFICIENT TO MAINTAIN A PH OF BETWEEN 6.5 AND 7.5 DURING ELECTROLYTIC DEPOSITION OF SAID METAL FROM SAID SOLUTION.
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) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |