US2504618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing alcohols
Assignee: Shell Development Co
•
Filing: 1947-10-03
•
Granted: 1950-04-18
•
Expires: 1967-10-03
Abstract
No abstract record available.
Inventors
- 👤 Raymond C Archibald
- 👤 Robert A Trimble
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:42
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/03; C07C29/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
IN A METHOD FOR THE DIRECT HYDRATION OF OLEFINS, THE STEP COMPRISING EFFECTING HYDRATION OF THE OLEFINS IN THE PRESENCE OF AN HF TREATED, ACTIVATED MONTMORILLONITE CATALYST, SAID CATALYST HAVING BEEN PRODUCED BY IMPREGNATING AN ACTIVATED MONTMORILLONITE BASE MATERIAL WITH HYDROFLUORIC ACID OF FROM 6 TO 10% STRENGTH, AND CALCINING THE RESULTING PRODUCT TO PRODUCE A DRY MATERIAL CONTAINING FROM 5% TO 15% BY WEIGHT HP.
References Cited (Backward Citations)
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US2173187A
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US2355868A
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US2370195A
Cited
US2377116A
Cited
US2358879A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-17 | 1953-10-17 | 1954-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-17 | 1957-10-17 | 1958-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-17 | 1961-10-17 | 1962-04-18 | $7700.00 | Window Closed / Lapsed |