US2554846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of n,n' diacyldiaminoalkanes
Assignee: Armour and Co
•
Filing: 1945-11-01
•
Granted: 1951-05-29
•
Expires: 1965-11-01
Abstract
No abstract record available.
Inventors
- 👤 Turinsky Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:03
CPC Classifications
C; C07; C07C; C07C235/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
IN A PROCESS FOR PREPARING N,N''DIACYLDIAMINOMETHANE, THE STEP OF REACTING AN ALIPHATIC AMIDE OF A MONOBASIC ACID AND FORMALDEHYDE AT A TEMPERATURE EXCEEDING THE MELTING POINT OF THE REACTION PRODUCT IN THE ABSENCE OF ORGANIC SOLVENTS AND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF AN INORGANIC ACID AND A STRONG ORGANIC ACID.
Claim 2
Dependent Claim
57 words
IN A PROCESS FOR PREPARING N,N''DIACYLDIAMINOMETHANE, THE STEP OF REACTING AN ALIPHATIC AMIDE OF A MONOBASIC ACID AND FORMALDEHYDE AT A TEMPERATURE EXCEEDING THE MELTING POINT OF THE REACTION PRODUCT IN THE ABSENCE OF ORGANIC SOLVENTS AND IN THE PRESENCE OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF AN INORGANIC ACID AND A STRONG ORGANIC ACID.
References Cited (Backward Citations)
US2096181A
Cited
FR782330A
Cited
US2279497A
Cited
GB537221A
Cited
GB541071A
Cited
US2186464A
Cited
GB538608A
Cited
US2365871A
Cited
US2365813A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |