US2418562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nitriles from propylene and ammonia
Assignee: Sinclair Refining Co
•
Filing: 1942-05-22
•
Granted: 1947-04-08
•
Expires: 1962-05-22
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:38
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/18; Y; Y10; Y10S; Y10S203/00; Y10S203/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE479079C
Cited
US1973474A
Cited
US2115884A
Cited
US1920795A
Cited
US1992615A
Cited
GB406700A
Cited
US2053193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-04-07 | 1950-10-07 | 1951-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-04-07 | 1954-10-07 | 1955-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-04-07 | 1958-10-07 | 1959-04-08 | $7700.00 | Window Closed / Lapsed |