US3737433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain oxoalkyldimethylxanthines
Assignee: Hoechst AG
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Filing: 1969-08-28
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Granted: 1973-06-05
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Expires: 1989-08-28
Abstract
Abstract ((W-1)-OXOALKYL)-3,7-DIMETHYLXANTHINES IN WHICH THE OXOALKYL HAS FROM 4 TO 7 CARBON ATOMS AND 7-((W-1)OXOALKYL)-1,3-DIMETHYLXANTHINES IN WHICH THE OXOALKYL HAS FROM 5 TO 8 CARBON ATOMS, WHILE THE KETO GROUP IS SEPARATED FROM THE XANTHINE NUCLEUS BY AT LEAST TWO CARBON ATOMS. THESE COMPOUNDS HAVE A MARKED VASO-DILATORY EFFECT WITH A LOW TOXICITY.
Inventors
- 👤 W Mohler
- 👤 M Reiser
- 👤 K Popendiker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:08
CPC Classifications
C; C07; C07D; C07D473/00; C07D473/02; C07D473/04; C07D473/06; C07D473/10; A; A61; A61K; A61K47/00; A61K47/06; A61K47/22; C07C; C07C45/00; C07C45/56; C07C45/57; C07C45/60; C07D309/00; C07D309/16; C07D309/28; C07D473/08
Claims Analysis
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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) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |