US2481080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of unsaturated nitriles
Assignee: Shell Development Co
•
Filing: 1948-04-06
•
Granted: 1949-09-06
•
Expires: 1968-04-06
Abstract
No abstract record available.
Inventors
- 👤 Robert C Castner
- 👤 Leslie M Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:34
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2125685A
Cited
US2181102A
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US2232785A
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US2301131A
Cited
US2356247A
Cited
US2402113A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-09-05 | 1953-03-07 | 1953-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-09-05 | 1957-03-07 | 1957-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-09-05 | 1961-03-07 | 1961-09-06 | $7700.00 | Window Closed / Lapsed |