US2824137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of preparing secondary aromatic amines
Assignee: Goodrich Corp
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Filing: 1955-10-24
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Granted: 1958-02-18
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Expires: 1975-10-24
Abstract
No abstract record available.
Inventors
- 👤 Roger E Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:29
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/74; C07C215/76
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF PREPARING SECONDARY AROMATIC AMINES COMPRISING REACTING A PRIMARY AROMATIC AMINE SELECTED FROM THE CLASS CONSISTING OF MONO- AND DIAMINO, MONOAND BICYCLIC PRIMARY AMINES WITH A PHENOL SELECTED FROM THE CLASS CONSISTING OF MONO- AND POLYHYDRIC MONO- AND BICYCLIC PHENOLS IN LIQUID PHASE, AT AN ELEVATED TEMPERATURE AND IN THE PRESENCE OF A CATALYST HAVING THE GENERIC FORMULA TI(X)N IN WHICH X REPRESENTS A MEMBER SELECTED FROM THE CLASS CONSISTING OF AN -OH RADICAL OF HYDRATED TITANIUM OXIDE, A HALIDE RADICAL, A SULFATE RADICAL, A LOWER ALKOXY RADICAL AND AN ACYL RADICAL OF ALIPHATIC FATTY ACIDS HAVING FROM 1 TO 18 CARBON ATOMS AND MIXTURES THEREOF, N IS A NUMBER FROM 2 TO 4 AND THE SUM OF THE VALENCES OF THE X GROUPS IS EQUAL TO THE VALENCE OF TITANIUM.
Claim 2
Independent Claim
133 words
A METHOD OF PREPARING SECONDARY AROMATIC AMINES COMPRISING REACTING A PRIMARY AROMATIC AMINE SELECTED FROM THE CLASS CONSISTING OF MONO- AND DIAMINO, MONOAND BICYCLIC PRIMARY AMINES WITH A PHENOL SELECTED FROM THE CLASS CONSISTING OF MONO- AND POLYHYDRIC MONO- AND BICYCLIC PHENOLS IN LIQUID PHASE, AT AN ELEVATED TEMPERATURE AND IN THE PRESENCE OF A CATALYST HAVING THE GENERIC FORMULA TI(X)N IN WHICH X REPRESENTS A MEMBER SELECTED FROM THE CLASS CONSISTING OF AN -OH RADICAL OF HYDRATED TITANIUM OXIDE, A HALIDE RADICAL, A SULFATE RADICAL, A LOWER ALKOXY RADICAL AND AN ACYL RADICAL OF ALIPHATIC FATTY ACIDS HAVING FROM 1 TO 18 CARBON ATOMS AND MIXTURES THEREOF, N IS A NUMBER FROM 2 TO 4 AND THE SUM OF THE VALENCES OF THE X GROUPS IS EQUAL TO THE VALENCE OF TITANIUM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-17 | 1961-08-19 | 1962-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-17 | 1965-08-19 | 1966-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-17 | 1969-08-19 | 1970-02-18 | $7700.00 | Window Closed / Lapsed |