US2509874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cyclic acetals
Assignee: Standard Oil Development Co
•
Filing: 1947-04-23
•
Granted: 1950-05-30
•
Expires: 1967-04-23
Abstract
No abstract record available.
Inventors
- 👤 Mcateer James Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:51
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF PREPARING A 1,3-DIOXOLANE FROM A POLYHYDRIC ALCOHOL HAVING HYDROXYL GROUPS ON ADJACENT CARBON ATOMS, WHICH COMPRISES CHEMICALLY CONDENSING TOGETHER MOLECULES OF THE ALCOHOL, PER SE, IN A LIQUID REACTION MIXTURE CONSISTING OF SAID ALCOHOL AND A SMALL AMOUNT OF CONCENTRATED SULFURIC ACID, HEATING SAID MIXTURE UNTIL THE ALCOHOL IS SUBSTANTIALLY CONVERTED TO A 1,3-DIOXOLANE, AND THEREAFTER DISTILLING FROM SAID MIXTURE THE 1,3-DIOXOLANE PRODUCT WITH OTHER VOLATILIZED PRODUCTS OF THE REACTION.
Claim 2
Independent Claim
73 words
THE METHOD OF PREPARING A 1,3-DIOXOLANE FROM A POLYHYDRIC ALCOHOL HAVING HYDROXYL GROUPS ON ADJACENT CARBON ATOMS, WHICH COMPRISES CHEMICALLY CONDENSING TOGETHER MOLECULES OF THE ALCOHOL, PER SE, IN A LIQUID REACTION MIXTURE CONSISTING OF SAID ALCOHOL AND A SMALL AMOUNT OF CONCENTRATED SULFURIC ACID, HEATING SAID MIXTURE UNTIL THE ALCOHOL IS SUBSTANTIALLY CONVERTED TO A 1,3-DIOXOLANE, AND THEREAFTER DISTILLING FROM SAID MIXTURE THE 1,3-DIOXOLANE PRODUCT WITH OTHER VOLATILIZED PRODUCTS OF THE REACTION.
References Cited (Backward Citations)
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US1681861A
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US1939189A
Cited
US2031594A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |