US3136819A
Expired / Lapsed
US
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Preparation of tertiary aliphatic methyl amines
Assignee: Armour and Co
•
Filing: 1958-05-16
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Granted: 1964-06-09
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Expires: 1978-05-16
Abstract
No abstract record available.
Inventors
- 👤 Sydney H Shapiro
- 👤 Pilch Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:57
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/01; C07C211/02; C07C211/03; C07C209/00; C07C209/24; C07C209/26; C07C209/44; C07C209/48; C07C211/07; C07C211/08; C07C211/26; C07C211/27; C07C213/00; C07C213/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
IN A PROCESS FOR THE PREPARATING OF TERTIARY ALIPHATIC METHYL AMINES WHEREIN FORMALDEHYDE IS PROGRESSIVELY ADDED TO AN AMINE, MAINTAINED IN THE LIQUID PHASE UNDER HYDROGEN PRESSURE AT REACTION TEMPERATURE AND PRESSURE, SELECTED FROM THE GROUP CONSISTING OF AMINES HAVING THE FORMULAE R1NH2, (R1)2NH, R1R2NH AND
Claim 2
Dependent Claim
46 words
IN A PROCESS FOR THE PREPARATING OF TERTIARY ALIPHATIC METHYL AMINES WHEREIN FORMALDEHYDE IS PROGRESSIVELY ADDED TO AN AMINE, MAINTAINED IN THE LIQUID PHASE UNDER HYDROGEN PRESSURE AT REACTION TEMPERATURE AND PRESSURE, SELECTED FROM THE GROUP CONSISTING OF AMINES HAVING THE FORMULAE R1NH2, (R1)2NH, R1R2NH AND
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-09 | 1967-12-09 | 1968-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-09 | 1971-12-09 | 1972-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-09 | 1975-12-09 | 1976-06-09 | $7700.00 | Window Closed / Lapsed |