Patent US3533220A successfully refreshed from Google Patents.
US3533220A
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Process for separating isotopic compounds by absorption
Assignee: Societe Nationale des Petroles dAquitaine SA
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Filing: 1967-02-13
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Granted: 1970-10-13
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Expires: 1987-02-13
Abstract
No abstract record available.
Inventors
- 👤 Lucien Espagno
- 👤 Claude Blanc
- 👤 Chanh Trung Huynh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:53
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/84; B; B01; B01D; B01D59/00; B01D59/22; B01D59/26; G01N30/26; G01N30/38; G01N30/44; G01N30/62; G01N30/72; G01N30/7206; G01N30/80; G01N30/82; G01N30/86; G01N30/8624; G01N30/8631; G01N2030/022; G01N2030/025; G01N2030/445; G01N30/46; G01N30/461
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2610260A
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US2780526A
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US3002583A
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US2977472A
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US3267646A
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US3348447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-12 | 1974-04-13 | 1974-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-12 | 1978-04-13 | 1978-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-12 | 1982-04-13 | 1982-10-13 | $7700.00 | Window Closed / Lapsed |