US3598706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid gold plating baths
Assignee: Trifari Krussman and Fishel Inc
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Filing: 1967-12-11
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Granted: 1971-08-10
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Expires: 1987-12-11
Abstract
Abstract THE INVENTION RELATES TO GOLD CYANIDE PLATING BATHS THAT ARE OPERATIONAL AT RELATIVELY LOW TO VERY LOW PH VALUES. THE BATHS DISCLOSED ARE STABLE AND FREE FROM AUCN PRECIPITATES AT PH VALUES AS LOW AS 0.1. THIS ADVANTAGEOUS RESULT IS OBTAINED BY UTILIZING IN THE ACID PLATING BATHS GOLD (III) CYANIDE COMPOUNDS IN WHICH THE GOLD CONTENT CONSISTS ESSENTIALLY OF GOLD IN ITS THREE VALENCE FORM. ESPECIALLY ADVANTAGEOUS RESULTS ARE REALIZED WHEN THE PLATING COMPOUND IS CYANOAURIC (III) ACID. NOVEL METHODS FOR PRODUCING GOLD (III) CYANIDE COMPOUNDS GENERALLY AND CYANOAURIC (III) ACID SPECIFICALLY ALSO FORMS PART OF THE INVENTION.
Inventors
- 👤 Emiel Freedman
- 👤 James N Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:36
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/48
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |