US3230098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immersion plating with noble metals
Assignee: Engelhard Industries Inc
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Filing: 1962-10-09
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Granted: 1966-01-18
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Expires: 1982-10-09
Abstract
No abstract record available.
Inventors
- 👤 Harold W Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:04
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31; C23C18/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
AN IONIC REPLACEMENT IMMERSION GOLD PLATING BATH CONSISTING ESSENTIALLY OF WATER, ABOUT 20 MILLIGRAMS TO ABOUT 30 GRAMS PER LITER OF A SOLUBLE GOLD SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM GOLD CYANIDE AND POTASSIUM GOLD CYANIDE, ABOUT 80 MILLIGRAMS TO ABOUT 120 GRAMS PER LITER OF AN AMMONIUM SALT OF A WEAK ACID, AND A WATER-SOLUBLE ORGANIC CHELATING AGENT PRESENT IN AMOUNT WITHIN THE WEIGHT RATIO RANGE OF CHELATING AGENT TO SOLUBLE GOLD SALT OF ABOUT 3:1 TO ABOUT 8:1 RESPECTIVELY, THE BATH HAVING A PH BETWEEN 5.5 AND 14.
Claim 2
Dependent Claim
92 words
AN IONIC REPLACEMENT IMMERSION GOLD PLATING BATH CONSISTING ESSENTIALLY OF WATER, ABOUT 20 MILLIGRAMS TO ABOUT 30 GRAMS PER LITER OF A SOLUBLE GOLD SALT SELECTED FROM THE GROUP CONSISTING OF SODIUM GOLD CYANIDE AND POTASSIUM GOLD CYANIDE, ABOUT 80 MILLIGRAMS TO ABOUT 120 GRAMS PER LITER OF AN AMMONIUM SALT OF A WEAK ACID, AND A WATER-SOLUBLE ORGANIC CHELATING AGENT PRESENT IN AMOUNT WITHIN THE WEIGHT RATIO RANGE OF CHELATING AGENT TO SOLUBLE GOLD SALT OF ABOUT 3:1 TO ABOUT 8:1 RESPECTIVELY, THE BATH HAVING A PH BETWEEN 5.5 AND 14.
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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |