US2493092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of electrodepositing copper and baths therefor
Assignee: United Chromium Inc
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Filing: 1946-01-11
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Granted: 1950-01-03
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Expires: 1966-01-11
Abstract
No abstract record available.
Inventors
- 👤 Jesse E Stareck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:16
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A METHOD OF DEPOSITING DENSE AND ADHERENT COPPER, CONSISTING IN PASSING ELECTRIC CURRENT FROM AN ANODE TO A CATHODE-OBJECT IMMERSED IN AN AQUEOUS BATH HAVING A PH BETWEEN 7.5 AND 9.5, AND A TEMPERATURE BETWEEN 70*F. AND 160*F., AND IN WHICH THE BATH CONSISTS ESSENTIALLY OF 7.5 TO 45 G./1. BIVALENT COPPER, 100 TO 250 G./. PYROPHOSPHATE (P2O7), 5 TO 20 G./1. NITRATE (NO3) AND 1 TO 3 G./1. AMMONIA (NH3).
Claim 2
Independent Claim
71 words
A METHOD OF DEPOSITING DENSE AND ADHERENT COPPER, CONSISTING IN PASSING ELECTRIC CURRENT FROM AN ANODE TO A CATHODE-OBJECT IMMERSED IN AN AQUEOUS BATH HAVING A PH BETWEEN 7.5 AND 9.5, AND A TEMPERATURE BETWEEN 70*F. AND 160*F., AND IN WHICH THE BATH CONSISTS ESSENTIALLY OF 7.5 TO 45 G./1. BIVALENT COPPER, 100 TO 250 G./. PYROPHOSPHATE (P2O7), 5 TO 20 G./1. NITRATE (NO3) AND 1 TO 3 G./1. AMMONIA (NH3).
References Cited (Backward Citations)
US2250556A
Cited
US2437865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-02 | 1953-07-04 | 1954-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-02 | 1957-07-04 | 1958-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-02 | 1961-07-04 | 1962-01-03 | $7700.00 | Window Closed / Lapsed |