US2913464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of improving monomeric material for preparation of oxetane polymers
Assignee: Hercules Powder Co
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Filing: 1956-07-13
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Granted: 1959-11-17
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Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 Patterson B Moseley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:15
CPC Classifications
C; C07; C07D; C07D305/00; C07D305/02; C07D305/04; C07D305/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD OF TREATING 3,3-BIS(CHLOROMETHYL)OXETANE PREPARED BY THE RING CLOSURE OF ONE OF THE GROUP CONSISTING OFPENTAERYTHRITOL TRICHLOROHYDRIN AND ESTERS THEREOF IN AQUEOUS MEDIUM WITH AN INORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES AND ALKALINE EARTH METAL HYDROXIDES TO REMOVE IMPURITIES DETRIMENTAL TO POLYMERIZATION THEROF WHICH COMPRISES CONTACTING UP TO ABOUT 20 PARTS BY WEIGHT OF SAID 3,3BIS(CHLOROMETHYL)OXETANE CONTAINING IMPURITIES SELECTED FROM THE GROUP CONSISTING OF PEROXIDES, ESTERS, ACIDS, CHLORIDES AND WATER WITH ONE PART BY WEIGHT OF AN ADSORBENT THAT HAS BEEN PREPARED BY HEATING ALUMINA TO A TEMPERATURE OF FROM ABOUT 450* C. TO ABOUT 600* C. FOR A SUFFICIENT TIME TO OBTAIN PREDOMINANTLY THE GAMMACRYSTALLINE FORM OF ALUMINA.
Claim 2
Independent Claim
115 words
A METHOD OF TREATING 3,3-BIS(CHLOROMETHYL)OXETANE PREPARED BY THE RING CLOSURE OF ONE OF THE GROUP CONSISTING OFPENTAERYTHRITOL TRICHLOROHYDRIN AND ESTERS THEREOF IN AQUEOUS MEDIUM WITH AN INORGANIC BASE SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES AND ALKALINE EARTH METAL HYDROXIDES TO REMOVE IMPURITIES DETRIMENTAL TO POLYMERIZATION THEROF WHICH COMPRISES CONTACTING UP TO ABOUT 20 PARTS BY WEIGHT OF SAID 3,3BIS(CHLOROMETHYL)OXETANE CONTAINING IMPURITIES SELECTED FROM THE GROUP CONSISTING OF PEROXIDES, ESTERS, ACIDS, CHLORIDES AND WATER WITH ONE PART BY WEIGHT OF AN ADSORBENT THAT HAS BEEN PREPARED BY HEATING ALUMINA TO A TEMPERATURE OF FROM ABOUT 450* C. TO ABOUT 600* C. FOR A SUFFICIENT TIME TO OBTAIN PREDOMINANTLY THE GAMMACRYSTALLINE FORM OF ALUMINA.
References Cited (Backward Citations)
US2749216A
Cited
US2722520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |