US3496218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocyanation of olefins
Assignee: EIDP Inc
•
Filing: 1967-10-31
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Granted: 1970-02-17
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Expires: 1987-10-31
Abstract
No abstract record available.
Inventors
- 👤 William Charles Drinkard Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:47
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/18; B01J31/1845; B01J31/185; B01J31/02; B01J31/12; B01J31/14; B01J31/146; C; C07; C07C; C07C253/00; C07C253/08; C07C253/10; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323; B01J2231/50; B01J2231/52; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
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) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |