US3544453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the extraction and recovery of aromatic hydrocarbons
Assignee: Universal Oil Products Co
•
Filing: 1968-12-05
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Granted: 1970-12-01
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Expires: 1988-12-05
Abstract
No abstract record available.
Inventors
- 👤 Herbert Lytle Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:33
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/28; B; B01; B01D; B01D11/00; B01D11/04; B01D11/0488; C07; C07C; C07C7/00; C07C7/10; C10G21/06; C10G21/12; C10G21/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3338824A
Cited
US3179708A
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US3209047A
Cited
US3338823A
Cited
US3361664A
Cited
US3436435A
Cited
US3461066A
Cited
US3476681A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |