US3277213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyhydroxy-polyoxyalkylene ethers derived from starch and process for preparing same
Assignee: Olin Corp
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Filing: 1962-06-27
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Granted: 1966-10-04
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Fuzesi Stephen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:54
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C07H15/08; C08; C08B; C08B31/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/487; C08G18/4883
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A PROCESS FOR THE PREPARATION OF A POLYHYDROXYPOLYOXYALKYLENE ETHER WHICH COMPRISES REACTING STARCH WITH AN ALCOHOL CONTAINING AT LEAST TWO CHYDROXYL GROUPS IN THE PRESENCE OF A LEWIS ACID CSTALYST AT AN ELEVATED TEMPERATURE, THE PORTION OF SAID ALCOHOL BEING AT LEAST 0.5 MOLE OF ALCOHOL PER GLUCOSE UNIT WEIGHT OF STARCH, THE PROPORATION OF LEWIS ACID CATALYST BEING AT LEAST 0.5 PERCENT OF THE TOTAL WEIGHT OF STARCH AND ALCOHOL, AND REACTING THE RESULTING REACTION MIXTURE WITH A 1,2-OSIDE SELECTED FROM THE GROUP CONSISTING OF ALKYLENE OXIDES, GLYCIDOL, EPIHALOHYDRINS, AND CYCLOALKYLENE OXIDES, IN THE PRESENCE OF AN APROTIC LEWIS ACID CATALST.
Claim 2
Dependent Claim
102 words
A PROCESS FOR THE PREPARATION OF A POLYHYDROXYPOLYOXYALKYLENE ETHER WHICH COMPRISES REACTING STARCH WITH AN ALCOHOL CONTAINING AT LEAST TWO CHYDROXYL GROUPS IN THE PRESENCE OF A LEWIS ACID CSTALYST AT AN ELEVATED TEMPERATURE, THE PORTION OF SAID ALCOHOL BEING AT LEAST 0.5 MOLE OF ALCOHOL PER GLUCOSE UNIT WEIGHT OF STARCH, THE PROPORATION OF LEWIS ACID CATALYST BEING AT LEAST 0.5 PERCENT OF THE TOTAL WEIGHT OF STARCH AND ALCOHOL, AND REACTING THE RESULTING REACTION MIXTURE WITH A 1,2-OSIDE SELECTED FROM THE GROUP CONSISTING OF ALKYLENE OXIDES, GLYCIDOL, EPIHALOHYDRINS, AND CYCLOALKYLENE OXIDES, IN THE PRESENCE OF AN APROTIC LEWIS ACID CATALST.
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) | 1969-10-03 | 1970-04-04 | 1970-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-03 | 1974-04-04 | 1974-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-03 | 1978-04-04 | 1978-10-04 | $7700.00 | Window Closed / Lapsed |