Patent US2501556A successfully refreshed from Google Patents.
US2501556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali metals and their hydrides as catalysts in amine condensation
Assignee: EIDP Inc
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Filing: 1949-12-16
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Granted: 1950-03-21
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Expires: 1969-12-16
Abstract
No abstract record available.
Inventors
- 👤 Gerald M Whitman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:36
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR OBTAINING AN AMINE, THE STEP OF HEATING A BASIC AMMONIA-TYPE COMPOUND OF THE GROUP CONSISTING OF AMMONIA AND AMINES WITH AN ACYCLIC HYDROCARBON CONTAINING NOT MORE THAN SIX CARBON ATOMS AND, AS THE SOLE UNSATURATION, A DOUBLE BOND BETWEEN THE CARBON ATOMS IN THE 1,2-POSITIONS, SAID HEATING BEING EFFECTED UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE OF AT LEAST 100*C. UNDER A PRESSURE OF AT LEAST 225 ATMOSPHERES IN THE PRESENCE, AS CATALYST OF A MEMBER OF THE GROUP CONSISTING OF ALKALI METAL HYDRIDES AND ELEMENTARY ALKALI METALS.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR OBTAINING AN AMINE, THE STEP OF HEATING A BASIC AMMONIA-TYPE COMPOUND OF THE GROUP CONSISTING OF AMMONIA AND AMINES WITH AN ACYCLIC HYDROCARBON CONTAINING NOT MORE THAN SIX CARBON ATOMS AND, AS THE SOLE UNSATURATION, A DOUBLE BOND BETWEEN THE CARBON ATOMS IN THE 1,2-POSITIONS, SAID HEATING BEING EFFECTED UNDER SUBSTANTIALLY ANHYDROUS CONDITIONS AT A TEMPERATURE OF AT LEAST 100*C. UNDER A PRESSURE OF AT LEAST 225 ATMOSPHERES IN THE PRESENCE, AS CATALYST OF A MEMBER OF THE GROUP CONSISTING OF ALKALI METAL HYDRIDES AND ELEMENTARY ALKALI METALS.
References Cited (Backward Citations)
No citation records indexed.
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 |