US2471922A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic derivatives
Assignee: Phillips Petroleum Co
•
Filing: 1944-06-22
•
Granted: 1949-05-31
•
Expires: 1964-06-22
Abstract
No abstract record available.
Inventors
- 👤 William N Axe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:13
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; C07C2527/00; C07C2527/06; C07C2527/08; C07C2527/12; C07C2527/1213; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1934123A
Cited
FR676508A
Cited
GB453422A
Cited
US2198185A
Cited
US2215569A
Cited
GB534492A
Cited
US2382260A
Cited
US2290211A
Cited
US2375041A
Cited
US2412595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-30 | 1952-11-29 | 1953-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-30 | 1956-11-29 | 1957-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-30 | 1960-11-29 | 1961-05-31 | $7700.00 | Window Closed / Lapsed |