US3553268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing aniline
Assignee: Witco Corp
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Filing: 1968-06-06
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Granted: 1971-01-05
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Expires: 1988-06-06
Abstract
Abstract PROCESS FOR PREPARING ANILINE FROM CYCLOHEXANONE OR MIXTURE THEREOF WITH CYCLOHEXANOL BY PASSING THE SAME, TOGETHER WITH AMMONIA, IN THE VAPOR PHASE AT ATMOSHERIC PRESSURE, OVER A HEATED NICKEL ON KIESELGUHR (OR OTHER INERT CARRIER) CATALYST.
Inventors
- 👤 Jack M Solomon
- 👤 Bernard R Bluestein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:54
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |