US3558656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycerol trichloroethyl carbonate and derivatives
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1968-04-19
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Granted: 1971-01-26
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Expires: 1988-04-19
Abstract
Abstract 1,2 AND 2,3-DIACYLGLYCEROLS ARE PREPARED FROM SN-GLYCEROL 1,2-ACETONIDE VIA THE INTERMEDIATE SN-GLYCEROL 1,2ACETONIDE 3-(2,2,2-TRICHLOROETHYL) CARBONATE, WHICH REARRANGES IN ACID TO GIVE SN-GLYCEROL 2,3-CARBONATE.
Inventors
- 👤 Francis R Pfeiffer
- 👤 Jerry A Weisbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:40
CPC Classifications
C; C11; C11C; C11C3/00; C07; C07D; C07D317/00; C07D317/08; C07D317/10; C07D317/14; C07D317/18; C07D317/24; C07D317/32; C07D317/34; C07D317/36; C11C3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |