Patent US3148195A successfully refreshed from Google Patents.
US3148195A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of amino-ethyl-carbazole by
Assignee: —
•
Filing: —
•
Granted: 1964-09-08
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Expires: 1981-09-08
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; C07D209/82; C07D209/88
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
PROCESS FOR THE PRODUCTION OF 3-AMINO-N-ETHYLCARBAZOLE BY THE CATALYTIC REDUCTION OF 3-NITRO-N-ETHYLCARBAZOLE WHICH COMPRISES DISSOLVING 3-NITRO-N-ETHYLCARBAZOLE IN A CHLORINATED AROMATIC HYDROCARBON SOLVENT AND SUBJECTING THE SAME TO THE ACTION OF HYDROGEN IN THE PRESENCE OF A SMALL AMOUNT OF A HYDROGENATION CATALYST CONSISTING ESSENTIALLY OF NICKEL ON AN INERT CARRIER.
Claim 2
Dependent Claim
50 words
PROCESS FOR THE PRODUCTION OF 3-AMINO-N-ETHYLCARBAZOLE BY THE CATALYTIC REDUCTION OF 3-NITRO-N-ETHYLCARBAZOLE WHICH COMPRISES DISSOLVING 3-NITRO-N-ETHYLCARBAZOLE IN A CHLORINATED AROMATIC HYDROCARBON SOLVENT AND SUBJECTING THE SAME TO THE ACTION OF HYDROGEN IN THE PRESENCE OF A SMALL AMOUNT OF A HYDROGENATION CATALYST CONSISTING ESSENTIALLY OF NICKEL ON AN INERT CARRIER.
References Cited (Backward Citations)
GB191307882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |