US2790016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for segregating aromatic hydrocarbons
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1952-02-01
•
Granted: 1957-04-23
•
Expires: 1972-02-01
Abstract
No abstract record available.
Inventors
- 👤 Keith P Lanneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:27
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/12; Y; Y10; Y10S; Y10S208/00; Y10S208/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2487574A
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US2571936A
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US2519081A
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US2612608A
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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) | 1960-04-22 | 1960-10-22 | 1961-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-22 | 1964-10-22 | 1965-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-22 | 1968-10-22 | 1969-04-23 | $7700.00 | Window Closed / Lapsed |