Patent US2240617A successfully refreshed from Google Patents.
US2702271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the deposition of gold or gold alloys
Assignee: Individual
•
Filing: 1952-07-21
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Granted: 1955-02-15
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Expires: 1972-07-21
Abstract
No abstract record available.
Inventors
- 👤 Spreter Victor
- 👤 Mermillod Jean
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; C25D3/56; C25D3/62; C25D3/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A PROCESS FOR THE ELECTROLYTIC DEPOSITION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF GOLD AND GOLDCOPPER ALLOYS PREDOMINANTLY OF GOLD WHICH COMPRISES PASSING AN ELECTROLYTIC CURRENT THROUGH AN AQUEOUS SOLUTION CONTAINING AN ALKALINE CYANIDE AND A CYANIDE OF SAID SELECTED MEMBER, AND CONTAINING, IN SOLUTION IN THE BATH, A SMALL QUANTITY OF A MITRO COMPOUND SELECTED FROM THE GROUP CONSISTING OF NITRO-GUANIDINE AND NITRO-UREA.
Claim 2
Dependent Claim
66 words
A PROCESS FOR THE ELECTROLYTIC DEPOSITION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF GOLD AND GOLDCOPPER ALLOYS PREDOMINANTLY OF GOLD WHICH COMPRISES PASSING AN ELECTROLYTIC CURRENT THROUGH AN AQUEOUS SOLUTION CONTAINING AN ALKALINE CYANIDE AND A CYANIDE OF SAID SELECTED MEMBER, AND CONTAINING, IN SOLUTION IN THE BATH, A SMALL QUANTITY OF A MITRO COMPOUND SELECTED FROM THE GROUP CONSISTING OF NITRO-GUANIDINE AND NITRO-UREA.
References Cited (Backward Citations)
US1903860A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |