Patent US3583906A successfully refreshed from Google Patents.
US3583906A
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Aromatic extraction process with diglycolamine solvent
Assignee: Howe Baker Engineers LLC
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Filing: 1968-08-15
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Granted: 1971-06-08
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Expires: 1988-08-15
Abstract
Abstract DIGLYCOLAMINE FOR EXTRACTING AROMATIC COMPOUNDS FROM HYDROCARBON LIQUIDS.
Inventors
- 👤 Michael R Basila
- 👤 Alfred R Pate Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:55
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20; C08; C08L; C08L21/00; C08K; C08K5/00; C08K5/16; C08K5/17; C08L2555/00; C08L2555/40; C08L2555/60; C08L2555/70; C08L2555/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |