US2694677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bright copper plating bath
Assignee: Individual
•
Filing: 1949-11-10
•
Granted: 1954-11-16
•
Expires: 1969-11-10
Abstract
No abstract record available.
Inventors
- 👤 Barnet D Ostrow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:02
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A BRIGHT COPPER PLATING BATH CONSISTING ESSENTIALLY OF AN ALKALINE AQUEOUS COPPER CYANIDE SOLUTION CONTAINING AT LEAST .005 GRAM PER LITER OF SELENIUM IN THE FORM OF A SOLUBLE SELENOPHENOL WHEREIN THE VALENCE OF THE SELENIUM IS MINUS 2.
Claim 2
Dependent Claim
39 words
A BRIGHT COPPER PLATING BATH CONSISTING ESSENTIALLY OF AN ALKALINE AQUEOUS COPPER CYANIDE SOLUTION CONTAINING AT LEAST .005 GRAM PER LITER OF SELENIUM IN THE FORM OF A SOLUBLE SELENOPHENOL WHEREIN THE VALENCE OF THE SELENIUM IS MINUS 2.
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) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |