US2597260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of nu-aliphatic morpholines
Assignee: Armour and Co
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Filing: 1951-02-16
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Granted: 1952-05-20
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Expires: 1971-02-16
Abstract
No abstract record available.
Inventors
- 👤 Richard A Reck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:36
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/023
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
29 words
THE PROCESS OF PREPARING N-ALIPHATIC MORPHOLINES, WHICH COMPRISES CYCLIZING BIS (2-HYDROXYETHYL) ALIPHATIC HYDROCARBON AMINES IN THE VAPOR PHASE AT FROM 300-400* C. WHILE IN CONTACT WITH A DEHYDRATION CATALYST.
Claim 2
Dependent Claim
29 words
THE PROCESS OF PREPARING N-ALIPHATIC MORPHOLINES, WHICH COMPRISES CYCLIZING BIS (2-HYDROXYETHYL) ALIPHATIC HYDROCARBON AMINES IN THE VAPOR PHASE AT FROM 300-400* C. WHILE IN CONTACT WITH A DEHYDRATION CATALYST.
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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |