US3743584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid bright copper plating bath
Assignee: Bayer Pharma AG
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Filing: 1971-06-02
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Granted: 1973-07-03
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Expires: 1991-06-02
Abstract
Abstract Polymeric phenazonium compounds, their method of preparation and their use in acid electrolytes for the deposition of bright, leveling, copper coatings on surfaces.
Inventors
- 👤 H Todt
- 👤 W Clauss
- 👤 W Dahms
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:38
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38; C07; C07D; C07D241/00; C07D241/36; C07D241/38; C07D241/46; C08; C08G; C08G73/00; C08G73/06; C08G73/0683; C08G73/0694
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
28 words
An electrolyte as set forth in claim 1, characterized in that it contains the identified compounds in quantities of 0.0005 to 0.1 g/liter, preferably 0.0005 to 0.03 g/liter.
Claim 2
Dependent Claim
22 words
An electrolyte according to claim 2, characterized in that it additionally contains oxygen-containing, high-molecular compounds and organic thio compounds with water-solubilizing groups.
Claim 3
Dependent Claim
46 words
Electrolyte according to claim 3, characterized in that it contains the oxygen-containing, high-molecular compounds in quantities of 0.01 to 20.0 g/liter, preferably 0.02 to 8.0 g/liter anD the organic thio compounds with water-solubilizIng groups in quantities of 0.0005 to 0.2 g/liter, preferably 0.01 to 0.1 g/liter.
Claim 4
Dependent Claim
17 words
An electrolyte for the deposition of bright copper coatings comprising at least one compound of the structure:
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |