Patent US2996550A successfully refreshed from Google Patents.
US2996550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polypropylene ether glycols
Assignee: EIDP Inc
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Filing: 1960-05-23
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Granted: 1961-08-15
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Expires: 1980-05-23
Abstract
No abstract record available.
Inventors
- 👤 Donald M Simons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:25
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/13; C07C43/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE PROCESS OF CONVERTING A MONOALLYL ETHER OF POLYPROPYLENE ETHER GLYCOL TO THE CORRESPONDING POLYPROPYLENE ETHER GLYCOL WHICH COMPRISES HEATING A MONOALLYL ETHER OF POLYPROPYLENE ETHER GLYCOL IN THE PRESENCE OF FROM ABOUT 1.0 TO 3.0 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID ETHER GLYCOL, OF POTASSIUM HYDROXIDE IN THE ABSENCE OF ATMOSPHERIC OXYGEN AT A TEMPERATURE OF FROM ABOUT 120 TO 160*C. FOR AT LEAST 30 MINUTES SO AS TO CONVERT AT LEAST A PORTION OF SAID MONOALLYL ETHER DERIVATIVE TO THE PROPENYL ETHER DERIVATIVE AND THEREAFTER HYDROLYZING SAID PROPENYL ETHER DERIVATIVE TO POLYPROPYLENE ETHER GLYCOL AND PROPIONALDEHYDE BY AGITATING SAID PROPENYL ETHER DERIVATIVE WITH A SUFFICIENT AMOUNT OF AN AQUEOUS SOLUTION OF AN ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, HYDROCHLORIC ACID AND PHOSPHORIC ACID SO AS TO GIVE THE HYDROLYSIS MASS A PH NO GREATER THAN 3 AND RECOVERING THE POLYPROPYLENE ETHER GLYCOL THEREBY OBTAINED.
Claim 2
Dependent Claim
152 words
THE PROCESS OF CONVERTING A MONOALLYL ETHER OF POLYPROPYLENE ETHER GLYCOL TO THE CORRESPONDING POLYPROPYLENE ETHER GLYCOL WHICH COMPRISES HEATING A MONOALLYL ETHER OF POLYPROPYLENE ETHER GLYCOL IN THE PRESENCE OF FROM ABOUT 1.0 TO 3.0 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF SAID ETHER GLYCOL, OF POTASSIUM HYDROXIDE IN THE ABSENCE OF ATMOSPHERIC OXYGEN AT A TEMPERATURE OF FROM ABOUT 120 TO 160*C. FOR AT LEAST 30 MINUTES SO AS TO CONVERT AT LEAST A PORTION OF SAID MONOALLYL ETHER DERIVATIVE TO THE PROPENYL ETHER DERIVATIVE AND THEREAFTER HYDROLYZING SAID PROPENYL ETHER DERIVATIVE TO POLYPROPYLENE ETHER GLYCOL AND PROPIONALDEHYDE BY AGITATING SAID PROPENYL ETHER DERIVATIVE WITH A SUFFICIENT AMOUNT OF AN AQUEOUS SOLUTION OF AN ACID SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, HYDROCHLORIC ACID AND PHOSPHORIC ACID SO AS TO GIVE THE HYDROLYSIS MASS A PH NO GREATER THAN 3 AND RECOVERING THE POLYPROPYLENE ETHER GLYCOL THEREBY OBTAINED.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |