US2742412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic deposition of copper
Assignee: METALLIC INDUSTRY NV
•
Filing: 1953-04-13
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Granted: 1956-04-17
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Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Cransberg Rolf
- 👤 Hendricus Andreas Va Osterhout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:27
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A BRIGHT COPPER PLATING BATH COMPRISING COPPER SULFATE, SULFURIC ACID, A BRIGHTENER IN A PROPORTION OF 550 MG./LITER, SAID BRIGHTENER BEING SELECTED FROM THE GROUP CONSISTING OF THIOUREA, ALLYLTHIOUREA AND ACETYLTHIOUREA, AND A FILLER SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, GLYCOL, ETHYLENE GLYCOL MONO ETHYL ETHER AND DIETHYLENE GLYCOL MONO BUTYL ETHER.
Claim 2
Dependent Claim
53 words
A BRIGHT COPPER PLATING BATH COMPRISING COPPER SULFATE, SULFURIC ACID, A BRIGHTENER IN A PROPORTION OF 550 MG./LITER, SAID BRIGHTENER BEING SELECTED FROM THE GROUP CONSISTING OF THIOUREA, ALLYLTHIOUREA AND ACETYLTHIOUREA, AND A FILLER SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, GLYCOL, ETHYLENE GLYCOL MONO ETHYL ETHER AND DIETHYLENE GLYCOL MONO BUTYL ETHER.
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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |