Patent US2805194A successfully refreshed from Google Patents.
US2805194A
Expired / Lapsed
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Bright copper plating
Assignee: Dayton Bright Copper Co
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Filing: 1955-07-18
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Granted: 1957-09-03
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 John F Beaver
- 👤 Charles N Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:06
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A METHOD OF ELECTRO-DEPOSITING COPPER FROM AN AQUEOUS COPPER SULFATE-SULFURIC ACID BATH, THE STEP WHICH COMPRISES ELECTROLYZING SAID AQUEOUS ACID COPPER BATH CONTAINING A MINOR PROPORTION OF A BRIGHTENER COMPOUND WHICH WIDENS THE RANGE OF SOLUTION CONCENTRATION AND ELECTRIC CURRENT DENSITIES WHEREIN PLATING CAN BE CONDUCTED WITHOUT ENCOUNTERING BURNING AND FORMING TREEING DEPOSITS, SAID BRIGHTENER COMPOUND COMPRISING A TRIPHENYLMETHANE DYE HAVING THE GENERAL STRUCTURAL FORMULA:
Claim 2
Dependent Claim
66 words
IN A METHOD OF ELECTRO-DEPOSITING COPPER FROM AN AQUEOUS COPPER SULFATE-SULFURIC ACID BATH, THE STEP WHICH COMPRISES ELECTROLYZING SAID AQUEOUS ACID COPPER BATH CONTAINING A MINOR PROPORTION OF A BRIGHTENER COMPOUND WHICH WIDENS THE RANGE OF SOLUTION CONCENTRATION AND ELECTRIC CURRENT DENSITIES WHEREIN PLATING CAN BE CONDUCTED WITHOUT ENCOUNTERING BURNING AND FORMING TREEING DEPOSITS, SAID BRIGHTENER COMPOUND COMPRISING A TRIPHENYLMETHANE DYE HAVING THE GENERAL STRUCTURAL FORMULA:
References Cited (Backward Citations)
US2238861A
Cited
US2707167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |