US3324145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparation of dioxolanes
Assignee: Dow Chemical Co
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Filing: 1964-10-02
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Granted: 1967-06-06
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Expires: 1984-10-02
Abstract
No abstract record available.
Inventors
- 👤 Norman L Madison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:26
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR PREPARING A DIOXOLANE WHICH COMPRISES: (A) PREPARING A MICTURE OF A PERHALOCETONE AND AN EPOXYALKANE, THE GRAM MOLE PROPORTIONS OF SAID ACETONE AND SAID EPOXYLAKANE RANGING FROM ABOUT 1/5 TO ABOUT 5/1, SAID EPOXYALKANE HAVING A CARBON ATOM CONTENT RANGING FROM ABOUT 2 TO ABOUT 8, (B) MAINTAINING THIS MIXTURE AT A MIXIMUM TEMPERATURE OF ABOUT 150*C. FOR A PERIOD OF FROM ABOUT SEVERAL MINUTES TO ABOUT 48 HOURS UNDER A VAPOR PRESSURE OF THE REACTION MIXTUE, AND (C) RECOVERING THE CORRESPONDING DIOXOLANE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
90 words
A PROCESS FOR PREPARING A DIOXOLANE WHICH COMPRISES: (A) PREPARING A MICTURE OF A PERHALOCETONE AND AN EPOXYALKANE, THE GRAM MOLE PROPORTIONS OF SAID ACETONE AND SAID EPOXYLAKANE RANGING FROM ABOUT 1/5 TO ABOUT 5/1, SAID EPOXYALKANE HAVING A CARBON ATOM CONTENT RANGING FROM ABOUT 2 TO ABOUT 8, (B) MAINTAINING THIS MIXTURE AT A MIXIMUM TEMPERATURE OF ABOUT 150*C. FOR A PERIOD OF FROM ABOUT SEVERAL MINUTES TO ABOUT 48 HOURS UNDER A VAPOR PRESSURE OF THE REACTION MIXTUE, AND (C) RECOVERING THE CORRESPONDING DIOXOLANE FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2925424A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-05 | 1970-12-05 | 1971-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-05 | 1974-12-05 | 1975-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-05 | 1978-12-05 | 1979-06-06 | $7700.00 | Window Closed / Lapsed |