US2941936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination catalytic cracking process producing aromatics concentrate
Assignee: Phillips Petroleum Co
•
Filing: 1956-09-21
•
Granted: 1960-06-21
•
Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Kenneth A Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:05
CPC Classifications
C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2608470A
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US2768126A
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US2809922A
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US2765264A
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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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |