US2447600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of unsaturated nitriles
Assignee: Phillips Petroleum Co
•
Filing: 1944-05-04
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Granted: 1948-08-24
•
Expires: 1964-05-04
Abstract
No abstract record available.
Inventors
- 👤 Walter A Schulze
- 👤 John E Mahan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:35
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/10; C07C2601/00; C07C2601/06; C07C2601/10; Y; Y10; Y10S; Y10S203/00; Y10S203/03
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |