Patent US2476771A successfully refreshed from Google Patents.
US2476771A
Expired / Lapsed
US
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Production of vinyl cyanide
Assignee: EIDP Inc
•
Filing: 1945-05-30
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Granted: 1949-07-19
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Expires: 1965-05-30
Abstract
No abstract record available.
Inventors
- 👤 Salzberg Paul Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:39
CPC Classifications
C; C07; C07C; C07C253/00; C07C253/08; C07C253/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1919886A
Cited
US1934324A
Cited
CH217478A
Cited
US2322696A
Cited
US2385470A
Cited
US2385327A
Cited
US2385469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |