Patent US3149057A successfully refreshed from Google Patents.
US3149057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acid gold plating
Assignee: Technic Inc
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Filing: 1959-04-27
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Granted: 1964-09-15
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Expires: 1979-04-27
Abstract
No abstract record available.
Inventors
- 👤 Edward A Parker
- 👤 James A Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:24
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/48; C25D3/56; C25D3/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
IN A BIRGHT GOLD PLATING BATH CONSISTING ESSENTIALLY OF A WATER SOLUTION OF GOLD CYANIDE, THE IMPROVEMENT WHICH COMPISES INCORPORATING AND MAINTAINING IN SAID SOLUTION A COBALTOUS CHELATE OF AN ETHYLENEDIAMINE ACETIC ACID COMPOUND, THE COBALTOUS CHELATE HAVING A STABILITY SUCH THAT IT IS NOT ELECTRODEPOSITED WITH THE GOLD UNDER PLATING CONDITIONS, THE SOLUTION BEING BUFFERED AT A PH LEVEL IN THE RANGE FROM ABOUT 3 TO ABOUT 5, THE CHELATE BEING SUCH THAT COBALT IS NOT DEPOSITED UNDER PLATING CONDITIONS.
Claim 2
Dependent Claim
81 words
IN A BIRGHT GOLD PLATING BATH CONSISTING ESSENTIALLY OF A WATER SOLUTION OF GOLD CYANIDE, THE IMPROVEMENT WHICH COMPISES INCORPORATING AND MAINTAINING IN SAID SOLUTION A COBALTOUS CHELATE OF AN ETHYLENEDIAMINE ACETIC ACID COMPOUND, THE COBALTOUS CHELATE HAVING A STABILITY SUCH THAT IT IS NOT ELECTRODEPOSITED WITH THE GOLD UNDER PLATING CONDITIONS, THE SOLUTION BEING BUFFERED AT A PH LEVEL IN THE RANGE FROM ABOUT 3 TO ABOUT 5, THE CHELATE BEING SUCH THAT COBALT IS NOT DEPOSITED UNDER PLATING CONDITIONS.
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) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |