US2492693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the catalytic intercondensation of monoolefins
Assignee: EIDP Inc
•
Filing: 1946-12-30
•
Granted: 1949-12-27
•
Expires: 1966-12-30
Abstract
No abstract record available.
Inventors
- 👤 William V Freed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:41
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2523/00; C07C2523/02; C07C2523/04; C07C2531/00; C07C2531/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2048169A
Cited
US2181640A
Cited
US2146447A
Cited
US2355925A
Cited
US2380358A
Cited
US2395381A
Cited
US2405950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |