US2927918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxypropylation of hydroxy compounds
Assignee: Dow Chemical Co
•
Filing: 1956-12-24
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Granted: 1960-03-08
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Expires: 1976-12-24
Abstract
No abstract record available.
Inventors
- 👤 Arthur W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A PROCESS COMPRISING REACTING PROPYLENE OXIDE WITH A POLYOL SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, PENTAERYTHRITOL, SORBITOAL AND SUCROSE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A TRIALKYLAMINE WHEREIN THE ALKYL GROUPS EACH CONTAIN 2 TO 3 CARBON ATOMS, WHEREBY EACH HYDROXYL GROUP OF THE POLYOL IS ETHERIFIED WITH A 2-HYDROXYPROPYL GROUP.
Claim 2
Dependent Claim
54 words
A PROCESS COMPRISING REACTING PROPYLENE OXIDE WITH A POLYOL SELECTED FROM THE GROUP CONSISTING OF GLYCEROL, PENTAERYTHRITOL, SORBITOAL AND SUCROSE IN THE PRESENCE OF A CATALYTIC AMOUNT OF A TRIALKYLAMINE WHEREIN THE ALKYL GROUPS EACH CONTAIN 2 TO 3 CARBON ATOMS, WHEREBY EACH HYDROXYL GROUP OF THE POLYOL IS ETHERIFIED WITH A 2-HYDROXYPROPYL GROUP.
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) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |