US3414484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating ethylbenzene from c8 aromatic hydrocarbons by super-distillation with vapor compression-reboiler heat exchange
Assignee: Universal Oil Products Co
•
Filing: 1966-06-20
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Granted: 1968-12-03
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Expires: 1986-06-20
Abstract
No abstract record available.
Inventors
- 👤 Don B Carson
- 👤 Ted B Haufe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:11
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; B; B01; B01D; B01D1/00; B01D1/28; B01D1/284; B01D1/2856; B01D3/00; B01D3/14; Y; Y10; Y10S; Y10S203/00; Y10S203/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA667832A
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GB308736A
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GB600574A
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US2509136A
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US2912365A
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US2959626A
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US3230155A
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US3265590A
Cited
US3254024A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |