US2491057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic oxidation of ethylene to ethylene oxide
Assignee: Atlantic Richfield Co
•
Filing: 1947-06-21
•
Granted: 1949-12-13
•
Expires: 1967-06-21
Abstract
No abstract record available.
Inventors
- 👤 John A Nevison
- 👤 Robert M Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/66; B01J23/70; B01J23/89; B01J23/8933; B01J23/8946; C; C07; C07D; C07D301/00; C07D301/02; C07D301/03; C07D301/04; C07D301/08; C07D301/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2142948A
Cited
US2238474A
Cited
US1043580A
Cited
US1998878A
Cited
GB466416A
Cited
US2423835A
Cited
US2424083A
Cited
US2424086A
Cited
US2426761A
Cited
US2430443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |