US3409544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon separation using two adsorption zones
Assignee: Phillips Petroleum Co
•
Filing: 1966-09-15
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Granted: 1968-11-05
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Expires: 1986-09-15
Abstract
No abstract record available.
Inventors
- 👤 John E Cottle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:40
CPC Classifications
C; C10; C10G; C10G25/00; C07; C07C; C07C7/00; C07C7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2632726A
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US2987471A
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US3109722A
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US3184518A
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US3281353A
Cited
US3260667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |