Patent US2501509A successfully refreshed from Google Patents.
US2501509A
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Preparation of amines
Assignee: EIDP Inc
•
Filing: 1945-05-05
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Granted: 1950-03-21
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Expires: 1965-05-05
Abstract
No abstract record available.
Inventors
- 👤 William F Gresham
- 👤 Richard E Brooks
- 👤 Walter M Bruner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:33
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A PROCESS FOR THE PREPARATION OF AMINES WHICH COMPRISES HEATING AN AMMONIA-TYPE COMPOUND OF THE CLASS CONSISTING OF AMMONIA, PRIMARY AMINES, AND SECONDARY AMINES WITH A HYDROCARBON OLEFINIC COMPOUND UNDER THE INFLUENCE OF AN ALKALI METAL CATALYST IN THE PRESENCE OF FROM 0.5 TO 10 PARTS OF AN ORGANIC LIQUID DILUENT FOR THE OLEFINIC REACTANT, PER PART OF THE OLEFINIC REACTANT, AT A TEMPERATURE WITHIN THE RANGE OF 50* TO 350*C. UNDER A REACTION PRESSURE WITHIN THE RANGE OF FROM 1 TO 1500 ATMOSPHERES.
Claim 2
Dependent Claim
84 words
A PROCESS FOR THE PREPARATION OF AMINES WHICH COMPRISES HEATING AN AMMONIA-TYPE COMPOUND OF THE CLASS CONSISTING OF AMMONIA, PRIMARY AMINES, AND SECONDARY AMINES WITH A HYDROCARBON OLEFINIC COMPOUND UNDER THE INFLUENCE OF AN ALKALI METAL CATALYST IN THE PRESENCE OF FROM 0.5 TO 10 PARTS OF AN ORGANIC LIQUID DILUENT FOR THE OLEFINIC REACTANT, PER PART OF THE OLEFINIC REACTANT, AT A TEMPERATURE WITHIN THE RANGE OF 50* TO 350*C. UNDER A REACTION PRESSURE WITHIN THE RANGE OF FROM 1 TO 1500 ATMOSPHERES.
References Cited (Backward Citations)
GB313934A
Cited
FR662431A
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DE528466C
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US2172822A
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US2381471A
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US2381470A
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US2381472A
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US2362464A
Cited
US2381709A
Cited
US2417892A
Cited
US2417893A
Cited
US2429855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |