US3305565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyepihalohydrin preparation using fluoboric acid catalyst
Assignee: Shell USA Inc
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Filing: 1964-07-08
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Granted: 1967-02-21
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Expires: 1984-07-08
Abstract
No abstract record available.
Inventors
- 👤 Albert C Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:59
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/24; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24; C08G65/223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR PREPARING A POLYGLYCIDYL ETHER WHICH COMPRISES ADDING AN EPOXY-HALO-SUBSTITUTED ALKANE IN SMALL INCREMENTS TO A MIXTURE OF FLUOBORIC ACID CATALYST AND AN INITIATOR SELECTED FROM THE GROUP CONSISTING OF WATER AND AN ALCOHOL IN THE PRESENCE OF AN INERT ORGANIC SOLVENT MEDIUM WHEREIN SAID FLUOBORIC ACID CATALYST IS PRESENT IN AN AMOUNT OF FROM ABOUT 0.1 TO ABOUT 5% BY WEIGHT BASED ON THE TOTAL AMOUNT OF EPOXY-HALO-SUBSTITUTED ALKANE AND THE MOL RATIO FO EPOXY-HALO-SUBSTITUTED ALKANE TO INITIATOR IS FROM 4:1 TO ABOUT 40:1 TO FORM AN EPOXY-HALISUBSTITUTED ALKANE POLYMER AND THEREAFTER TREATING SAID POLYMER WITH AN ALKALINE MATERIAL IN EXCESS OF THAT REQUIRED TO CONVERT THE HALOHYDRIN GROUPS TO THE CORRESPONDING EPOXY GROUPS.
Claim 2
Dependent Claim
117 words
A PROCESS FOR PREPARING A POLYGLYCIDYL ETHER WHICH COMPRISES ADDING AN EPOXY-HALO-SUBSTITUTED ALKANE IN SMALL INCREMENTS TO A MIXTURE OF FLUOBORIC ACID CATALYST AND AN INITIATOR SELECTED FROM THE GROUP CONSISTING OF WATER AND AN ALCOHOL IN THE PRESENCE OF AN INERT ORGANIC SOLVENT MEDIUM WHEREIN SAID FLUOBORIC ACID CATALYST IS PRESENT IN AN AMOUNT OF FROM ABOUT 0.1 TO ABOUT 5% BY WEIGHT BASED ON THE TOTAL AMOUNT OF EPOXY-HALO-SUBSTITUTED ALKANE AND THE MOL RATIO FO EPOXY-HALO-SUBSTITUTED ALKANE TO INITIATOR IS FROM 4:1 TO ABOUT 40:1 TO FORM AN EPOXY-HALISUBSTITUTED ALKANE POLYMER AND THEREAFTER TREATING SAID POLYMER WITH AN ALKALINE MATERIAL IN EXCESS OF THAT REQUIRED TO CONVERT THE HALOHYDRIN GROUPS TO THE CORRESPONDING EPOXY GROUPS.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |