US3408263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single column distillation of mixture of aromatics containing styrene
Assignee: Universal Oil Products Co
•
Filing: 1966-11-22
•
Granted: 1968-10-29
•
Expires: 1986-11-22
Abstract
No abstract record available.
Inventors
- 👤 Dennis J Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:29
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA515494A
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US2240764A
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US2336493A
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US2370948A
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US2411106A
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US2557684A
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US2556030A
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US3209044A
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US3219721A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |