US3783142A
Expired / Lapsed
US
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Process for the preparation of o-aminobenzonitrile
Assignee: Saab Bofors AB
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Filing: 1971-05-19
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Granted: 1974-01-01
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Expires: 1991-05-19
Abstract
Abstract O-AMINOBENZONTRILE IS OBTAINED FROM O-NITROTOLUENE BY HEATING THE LATTER WITH AMMONIA AT ABOUT 350-550*C. IN THE PRESSENCE OF A DEHYDRATION CATALYST.
Inventors
- 👤 J Bakke
- 👤 H Heikmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:02
CPC Classifications
C; C07; C07C; C07C255/00; C07C255/49; C07C255/50; B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J21/06; B01J21/08; B01J29/00; B01J29/04; B01J29/06
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |