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US3401092A
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Two-zone distillation process and system having vapor flows controlled by the pressure differential
Assignee: Phillips Petroleum Co
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Filing: 1966-04-22
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Granted: 1968-09-10
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Expires: 1986-04-22
Abstract
No abstract record available.
Inventors
- 👤 Matta Romeo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:43
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4238; G; G05; G05D; G05D11/00; Y; Y10; Y10S; Y10S203/00; Y10S203/19; Y10S208/00; Y10S208/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3032478A
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US3158556A
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US3136706A
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US3156628A
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US3264365A
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US3238111A
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US3130027A
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US3296121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |