Patent US3261000A successfully refreshed from Google Patents.
US2623909A
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Hydrolysis of 1, 2-propylene oxide to 1, 2-propylene glycol
Assignee: Celanese Corp
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Filing: 1950-07-12
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Granted: 1952-12-30
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Expires: 1970-07-12
Abstract
No abstract record available.
Inventors
- 👤 Max O Robeson
- 👤 Thomas P Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:07
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/09; C07C29/10; C07C29/103; C07C29/106
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A PROCESS FOR THE HYDROLYSIS OF 1,2-PROPYLENE OXIDE, THE STEP WHICH COMPRISES HEATING 1,2-PROPYLENE OXIDE WITH FROM 3 TO 5 PARTS BY WEIGHT OF WATER AT AN ELEVATED TEMPERATURE UNDER AUTOGENOUS PRESSURE WHILE MAINTAINING THE PH OF THE REACTION MEDIUM AT FROM 6 TO 6.5 BY HAVING PRESENT IN THE REACTION MIXTURE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF METHYL FORMATE AND CARBON DIOXIDE.
Claim 2
Dependent Claim
66 words
IN A PROCESS FOR THE HYDROLYSIS OF 1,2-PROPYLENE OXIDE, THE STEP WHICH COMPRISES HEATING 1,2-PROPYLENE OXIDE WITH FROM 3 TO 5 PARTS BY WEIGHT OF WATER AT AN ELEVATED TEMPERATURE UNDER AUTOGENOUS PRESSURE WHILE MAINTAINING THE PH OF THE REACTION MEDIUM AT FROM 6 TO 6.5 BY HAVING PRESENT IN THE REACTION MIXTURE A COMPOUND SELECTED FROM THE GROUP CONSISTING OF METHYL FORMATE AND CARBON DIOXIDE.
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) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |