US2612436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 09:58
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.
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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 |