US2770587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bath for plating bright copper
Assignee: Elechem Corp
•
Filing: 1956-06-04
•
Granted: 1956-11-13
•
Expires: 1976-06-04
Abstract
No abstract record available.
Inventors
- 👤 Barnet D Ostrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:35
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
AN ELECTROLYTIC BATH COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A CYANIDE OF COPPER, AND A SOLUBLE SELENIUM COMPOUND IN WHICH THE SELENIUM HAS A VALENCE OF -2 IN AMOUNT SUFFICIENT TO EXERT A BRIGHTENING EFFECT ON THE COPPER DEPOSIT.
Claim 2
Dependent Claim
39 words
AN ELECTROLYTIC BATH COMPRISING AN AQUEOUS ALKALINE SOLUTION OF A CYANIDE OF COPPER, AND A SOLUBLE SELENIUM COMPOUND IN WHICH THE SELENIUM HAS A VALENCE OF -2 IN AMOUNT SUFFICIENT TO EXERT A BRIGHTENING EFFECT ON THE COPPER DEPOSIT.
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) | 1959-11-13 | 1960-05-14 | 1960-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-13 | 1964-05-14 | 1964-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-13 | 1968-05-14 | 1968-11-13 | $7700.00 | Window Closed / Lapsed |