US3370081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of aromatic nitriles
Assignee: Knapsack AG
•
Filing: 1964-08-10
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Granted: 1968-02-20
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Expires: 1984-08-10
Abstract
No abstract record available.
Inventors
- 👤 Sennewald Kurt
- 👤 Vogt Wilhelm
- 👤 Ohorodnik Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:43
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/06; B01J21/08; B01J23/00; B01J23/16; B01J23/20; B01J23/22; B01J23/70; B01J23/76; B01J23/84; B01J27/00; B01J27/14; B01J27/186; B01J27/195; B01J27/198; C; C07; C07C; C07C253/00; C07C253/24; C07C253/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1071690B
Cited
US2478464A
Cited
US2540787A
Cited
US2828325A
Cited
US2833807A
Cited
DE1141274B
Cited
US3278573A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-02-19 | 1971-08-21 | 1972-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-02-19 | 1975-08-21 | 1976-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-02-19 | 1979-08-21 | 1980-02-20 | $7700.00 | Window Closed / Lapsed |