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Patent US3159703A successfully refreshed from Google Patents.
US3159703A
Expired / Lapsed
US
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Apparatus for the separation of platinum and gold by volatilization
Assignee: Individual
•
Filing: 1961-10-26
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Granted: 1964-12-01
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Edson R Wolcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:08
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1599372A
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US1554972A
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US1806042A
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US2104741A
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US2238792A
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US2349747A
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US2349801A
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US2784960A
Cited
US2900236A
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US3021209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |