US2915529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing glycerin carbonate
Assignee: Jefferson Chemical Co Inc
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Filing: 1957-04-15
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Granted: 1959-12-01
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Expires: 1977-04-15
Abstract
No abstract record available.
Inventors
- 👤 Jr John Barr Bell
- 👤 Currier Vernon Arthur
- 👤 Malkemus John David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:36
CPC Classifications
C; C07; C07C; C07C68/00; C07C68/06; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/32; C07D317/34; C07D317/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR MANUFACTURING MONOMERIC GLYCERIN CARBONATE WHICH COMPRISES REACTING GLYCERIN WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYLENE AND DIALKYL CARBONATES IN THE PRESENCE OF AN ALKALINE COMPOUND PROVIDING A PH OF THE REACTION MIXTURE OF ABOUT 7.5 TO 9, THE REACTION BEING CARRIED OUT AT A TEMPERATURE OF ABOUT 80*C. TO ABOUT 175*C., ACIDIFYING THE RESULTING REACTION MIXTURE TO A PH OF ABOUT 2.5 TO 6, AND ISOLATING FROM THE ACIDIFIED REACTION PRODUCTS BY DISTILLATION MONOMERIC GLYCERIN CARBONATE AS AN ESSENTIAL PRODUCT.
Claim 2
Dependent Claim
87 words
A PROCESS FOR MANUFACTURING MONOMERIC GLYCERIN CARBONATE WHICH COMPRISES REACTING GLYCERIN WITH A COMPOUND SELECTED FROM THE GROUP CONSISTING OF LOWER ALKYLENE AND DIALKYL CARBONATES IN THE PRESENCE OF AN ALKALINE COMPOUND PROVIDING A PH OF THE REACTION MIXTURE OF ABOUT 7.5 TO 9, THE REACTION BEING CARRIED OUT AT A TEMPERATURE OF ABOUT 80*C. TO ABOUT 175*C., ACIDIFYING THE RESULTING REACTION MIXTURE TO A PH OF ABOUT 2.5 TO 6, AND ISOLATING FROM THE ACIDIFIED REACTION PRODUCTS BY DISTILLATION MONOMERIC GLYCERIN CARBONATE AS AN ESSENTIAL PRODUCT.
References Cited (Backward Citations)
US1995291A
Cited
US2563771A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |