US2658081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ether-alcohols
Assignee: Monsanto Chemicals Ltd
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Filing: 1950-12-16
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Granted: 1953-11-03
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Expires: 1970-12-16
Abstract
No abstract record available.
Inventors
- 👤 William S Emerson
- 👤 Jr Raymond I Longley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:11
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
68 words
THE METHOD OF PREPARING 5-ALKOXYPENTANOLS AND WHICH THE ALKOXY RADICAL HAS FROM 1 TO 4 CARBON ATOMS WHICH COMPRISES CONTACTING WITH HYDROGEN A 2-ALKOXY-3,4-DIHYDRO-1,2-PYRAN IN WHICH THE ALKOXY RADICAL HAS FROM 1 TO 4 CARBON ATOMS, IN THE PRESENCE OF A HYDROGENATION CATALYST, AT A TEMPERATURE OF FROM 175* C. TO 300* C., AT A PRESSURE OF AT LEAST 500 POUNDS PER SQUARE INCH, AND UNDER ANHYDROUS CONDITIONS.
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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |