US2762845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkylation of aromatic amines
Assignee: Bayer AG
•
Filing: 1954-12-22
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Granted: 1956-09-11
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Expires: 1974-12-22
Abstract
No abstract record available.
Inventors
- 👤 Stroh Rudolf
- 👤 Ebersberger Josef
- 👤 Haberlaud Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:09
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
30 words
PROCESS FOR THE ALKYLATION OF AROMATIC AMINES, WHICH COMPRISES HEATING AN AROMATIC AMINE WITH AN OLEFIN AT A TEMPERATURE WITHIN THE RANGE OF 200*-400* C. IN THE PRESENCE OF ALUMINUM.
Claim 2
Dependent Claim
30 words
PROCESS FOR THE ALKYLATION OF AROMATIC AMINES, WHICH COMPRISES HEATING AN AROMATIC AMINE WITH AN OLEFIN AT A TEMPERATURE WITHIN THE RANGE OF 200*-400* C. IN THE PRESENCE OF ALUMINUM.
References Cited (Backward Citations)
US2448160A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-11 | 1960-03-12 | 1960-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-11 | 1964-03-12 | 1964-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-11 | 1968-03-12 | 1968-09-11 | $7700.00 | Window Closed / Lapsed |