US3555047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3 - lower alkyl or alkoxy - 6 - hydroxy flavans and ester derivatives thereof
Assignee: Merck KGaA
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Filing: 1966-10-19
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Granted: 1971-01-12
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Expires: 1986-10-19
Abstract
Abstract THE FOLLOWING FLAVANE COMPOUNDS EXHIBIT A CHOLESTEROL-LEVEL-LOWERING ACTIVITY WITHOUT, HOWERE, EFFECTING A NONPHYSIOLOGICAL ACCUMULATION OF DEMOSTEROL OR 7-DEHYDROCHOLESTEROL IN THE STEROLS OF THE SERUM OR OF THE LIVER; 2-(C6H5-),3-R1,6-(R2-O-)CHROMAN WHEREIN R1 REPRESENTS ALKYL OR ALKOXY OF 1-6 CARBON ATOMS; R2 REPRESENTS HYDROGEN, ALKYL OF 1-6 CARBON ATOMS, OR AN ESTER, THE ACYL PORTION BEING UP TO 5 CARBON ATOMS.
Inventors
- 👤 Klaus Irmscher
- 👤 Josef Kramer
- 👤 Herbert Halpaap
- 👤 Karl-Otto Freisberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:35
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/60; C07D311/62
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |