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US2699836A
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Separation of gases by diffusion
Assignee: Phillips Petroleum Co
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Filing: 1951-10-15
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Granted: 1955-01-18
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Expires: 1971-10-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Hugh M Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:27
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D2313/00; B01D2313/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB266396A
Cited
GB291576A
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US2255069A
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DE733079C
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US2494554A
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US2497898A
Cited
US2584785A
Cited
US2609059A
Cited
US2540152A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-17 | 1958-07-19 | 1959-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-17 | 1962-07-19 | 1963-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-17 | 1966-07-19 | 1967-01-18 | $7700.00 | Window Closed / Lapsed |