US2690997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrodeposition of copper
Assignee: Westinghouse Electric Corp
•
Filing: 1952-10-21
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Granted: 1954-10-05
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Expires: 1972-10-21
Abstract
No abstract record available.
Inventors
- 👤 George W Jernstedt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:09
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C25D3/40
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
27 words
AN IMPROVED AQUEOUS COPPER CYANIDE ELECTROPLATING ELECTROLYTE COMPRISING FROM 0.01 TO 0.4 OUNCE OF LITHIUM PER GALLON OF THE ELECTROLYTE, THE LITHIUM BEING DISSOLVED IN THE ELECTROLYTE.
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) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |