Patent US2612436A successfully refreshed from Google Patents.
US2612436A
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Method of preparing alkali metal amides
Assignee: Shell Development Co
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Filing: 1947-07-29
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Granted: 1952-09-30
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Expires: 1967-07-29
Abstract
No abstract record available.
Inventors
- 👤 Overhoff Johan
- 👤 Hackmann Johannes Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:25
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/73; C01; C01B; C01B21/00; C01B21/082; C01B21/087; C01B21/092; C01B21/0923; C01B21/0926
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
THE PROCESS FOR THE PRODUCTION OF AN ALKALI AMIDE WHICH COMPRISES REACTING AMMONIA AT A TERMPERATUER OF FROM ABOUT 100* TO ABOUT 200* C. WITH AN ALKALI METAL, SAID ALKALI METAL BEING DISPERSED IN AN N,N-DIALKYLARYLAMINE, AND IN THE PRESENCE OF (1) A CATALYST CONSISTING ESSENTIALLY OF AN OXIDE OF AN ALKALI METAL IN ADMIXTURE WITH AN AMMONIA-SOLUBLE HYDRATED SALT OF A METAL SELECTED FROM THE GROUP CONSISTING OF IRON, COBALT AND NICKEL, AND (2) AT LEAST 0.5% BY WEIGHT OF THE REACTION MIXTURE OF PRIMARY ARYL AMINE.
References Cited (Backward Citations)
GB191501613A
Cited
DE362446C
Cited
DE358397C
Cited
US1570467A
Cited
US1789022A
Cited
US2000411A
Cited
US1938890A
Cited
US2104407A
Cited
US2163100A
Cited
US2202994A
Cited
US2106180A
Cited
DE742255C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-30 | 1956-03-31 | 1956-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-30 | 1960-03-31 | 1960-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-30 | 1964-03-31 | 1964-09-30 | $7700.00 | Window Closed / Lapsed |