US3518165A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating alkylation effluent by plural stage distillation with benzene recycle
Assignee: Universal Oil Products Co
•
Filing: 1968-03-29
•
Granted: 1970-06-30
•
Expires: 1988-03-29
Abstract
No abstract record available.
Inventors
- 👤 Dennis J Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:13
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2694095A
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US2658863A
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US2787648A
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US2818452A
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US2992168A
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US3031384A
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US3046316A
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US3230156A
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US3209051A
Cited
US3255269A
Cited
US3399120A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |