US2442040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of acrylonitrile from acetylene and hcn
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1946-05-29
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Granted: 1948-05-25
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Expires: 1966-05-29
Abstract
No abstract record available.
Inventors
- 👤 Foster Reginald Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:06
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1541174A
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US1812542A
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CH217478A
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US2338459A
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US2385551A
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US2409124A
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US2385470A
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US2385327A
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US2414762A
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US2385469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-05-25 | 1951-11-24 | 1952-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-05-25 | 1955-11-24 | 1956-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-05-25 | 1959-11-24 | 1960-05-25 | $7700.00 | Window Closed / Lapsed |