US3753985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-amino-flavanones
Assignee: Bayer Corp
•
Filing: 1970-12-28
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Granted: 1973-08-21
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Expires: 1990-12-28
Abstract
Abstract IN WHICH R1 IS HYDROGEN, R2 IS OH OR O (LOWER)ACYL, OR R1R2 TAKEN TOGETHER ARE O, R3 IS H OR (LOWER)ALKYL, R4 IS H OR (LOWER)ALKYL OR NR3R4 IS A HETEROCYCLIC MOIETY OF SIX MEMBERS, X IS A HALOGEN, (LOWER)ALKYL OR (LOWER) ALKOXY, AND Y IS A HALOGEN, (LOWER)ALKYL, OR (LOWER)ALKOXY, A PROCESS FOR PREPARING SUCH COMPOUNDS, AND A PROCESS FOR INHIBITING THE GROWTH OF MICROORGANISMS. 2-(Y-C6H4-),3-(R3-N(-R4)-CH2-),4-R1,4-R2,X-CHROMAN A GROUP OF FLAVANONE DERIVATIVES OF THE STRUCTURAL FORMULA
Inventors
- 👤 J Gavin
- 👤 H Walchli
- 👤 D Stauffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:09
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/26; C07D311/28; C07D311/32
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |