Patent US2515872A successfully refreshed from Google Patents.
US2515872A
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Preparation of secondary and tertiary aromatic amines
Assignee: Porocel Industries LLC
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Filing: 1946-11-09
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Granted: 1950-07-18
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Expires: 1966-11-09
Abstract
No abstract record available.
Inventors
- 👤 Heinemann Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:09
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A METHOD FOR PRODUCING SECONDARY AND TERTIARY AMINES, WHICH COMPRISES CONTACTING AN ALIPHATIC ALCOHOL OF FROM 1 TO 20 CARBON ATOMS AND AN AROMATIC AMINE CONTAINING AT LEAST ONE HYDROGEN ATOM BONDED TO THE AMINO NITROGEN ATOM, AT A TEMPERATURE BETWEEN 450*F. AND 600*F. WITH BAUXITE THERMALLY ACTIVATED AT 600*F. TO 1600*F. AND CONTAINING BETWEEN 4% AND 22% OF NATURALLY OCCURRING IRON OXIDE.
Claim 2
Independent Claim
63 words
A METHOD FOR PRODUCING SECONDARY AND TERTIARY AMINES, WHICH COMPRISES CONTACTING AN ALIPHATIC ALCOHOL OF FROM 1 TO 20 CARBON ATOMS AND AN AROMATIC AMINE CONTAINING AT LEAST ONE HYDROGEN ATOM BONDED TO THE AMINO NITROGEN ATOM, AT A TEMPERATURE BETWEEN 450*F. AND 600*F. WITH BAUXITE THERMALLY ACTIVATED AT 600*F. TO 1600*F. AND CONTAINING BETWEEN 4% AND 22% OF NATURALLY OCCURRING IRON OXIDE.
References Cited (Backward Citations)
US2113241A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |