US3749650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrodepositing gold alloys
Assignee: Individual
•
Filing: 1972-04-14
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Granted: 1973-07-31
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Expires: 1992-04-14
Abstract
Abstract GOLD ALLOYS OF IMPROVED MECHANICAL AND ELECTRICAL PROPERTIES ARE ELECTRODEPOSITED CATHODICALLY FROM AQUEOUS ELECTROLYTES ON CONDUCTIVE ARTICLES BY MEANS OF CYCLICALLY VARYING POTENTIALS, THE POTENTIAL IN A FIRST PERIOD OF EACH CYCLE HAVING A DURATION OF AT LEAST 0.1 SECOND BEING EQUAL TO THE DEPOSITION POTENTIAL OF THE ALLOY COMPONENTS, THE POTENTIAL IN A SECOND PERIOD OF 10**-3 TO 10**-4 SECOND BEING MUCH HIGHER THAN IN THE FIRST PERIOD, AND THE SECOND PERIOD BEING FOLLOWED BY A THIRD PERIOD OF APPROXIMATELY 10**-1 TO 10**-3 SECOND IN WHICH THERE IS NO SIGNIFICANT POTENTIAL BETWEEN THE CATHODE AND THE ELECTROLYTE.
Inventors
- 👤 M Dettke
- 👤 R Ludwig
- 👤 W Riedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:31
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/56; C25D3/62; C25D5/00; C25D5/18; C25D5/60; C25D5/615; C25D5/617; C25D5/627; Y; Y10; Y10S; Y10S204/00; Y10S204/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |