US2809994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for alkylating aromatic amines
Assignee: Metal Hydrides Inc
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Filing: 1956-06-14
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Granted: 1957-10-15
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Expires: 1976-06-14
Abstract
No abstract record available.
Inventors
- 👤 Alfred A Hinckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:19
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/06; C07C209/08; C07C209/60; C07C209/68; C07C211/00; C07C211/01; C07C211/02; C07C211/03; C07C211/08; C07C211/26; C07C211/27
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A METHOD FOR ALKYLATING A PRIMARY AROMATIC AMINE WHEREIN A SODIUM SALT OF TH AMINE IS FORMED AND IS CONVERTED TO A SECONDARY AMINE BY REACTION WITH AN ORGANIC HALIDE, THE IMPROVEMENT WHICH COMPRISES ASSOCIATING THE HALIDE AND SODIDUM HYDRIDE SIMULTANEOUSLY WITH THE AMINE IN A POLAR SOLVENT FOR THE PRIMARY AMINE AND THE HALIDE IN THE PROPORTION OF ABOUT ONE MOLE EACH OF THE HALIDE AND HYDRIDE FOR EACH MOLE OF AMINE, AND HEATING THE MIXTURE AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 150*C. UNTIL SUBSTANTIALLY ALL THE PRIMARY AMINE HAS BEEN CONVERTED TO A SECONDARY AMINE.
Claim 2
Dependent Claim
99 words
IN A METHOD FOR ALKYLATING A PRIMARY AROMATIC AMINE WHEREIN A SODIUM SALT OF TH AMINE IS FORMED AND IS CONVERTED TO A SECONDARY AMINE BY REACTION WITH AN ORGANIC HALIDE, THE IMPROVEMENT WHICH COMPRISES ASSOCIATING THE HALIDE AND SODIDUM HYDRIDE SIMULTANEOUSLY WITH THE AMINE IN A POLAR SOLVENT FOR THE PRIMARY AMINE AND THE HALIDE IN THE PROPORTION OF ABOUT ONE MOLE EACH OF THE HALIDE AND HYDRIDE FOR EACH MOLE OF AMINE, AND HEATING THE MIXTURE AT A TEMPERATURE BETWEEN ABOUT 40*C. AND 150*C. UNTIL SUBSTANTIALLY ALL THE PRIMARY AMINE HAS BEEN CONVERTED TO A SECONDARY AMINE.
References Cited (Backward Citations)
US1887228A
Cited
US2501556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |