Patent US4031099A successfully refreshed from Google Patents.
US4031099A
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4-Hydroxy-3-nitro-5,6,7,8 tetrahydro-carbostyrils
Assignee: Beecham Group PLC
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Filing: 1974-10-07
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Granted: 1977-06-21
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Expires: 1994-10-07
Abstract
Abstract A class of 4-hydroxy-3-nitro-α-pyridones have anti-allergic activity.
Inventors
- 👤 Derek Richard Buckle
- 👤 Barrie Christian Charles Cantello
- 👤 Harry Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:04
CPC Classifications
C; C07; C07D; C07D215/00; C07D215/02; C07D215/16; C07D215/20; C07D215/22; C07D215/24; C07D215/26; C07D215/38; C07D215/40; C07D221/00; C07D221/02; C07D221/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
5 words
The compound which is 4-hydroxy-7-methyl-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 2
Dependent Claim
5 words
The compound which is 4-hydroxy-7-methyl-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 3
Dependent Claim
5 words
The compound which is 5,7-dimethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 4
Dependent Claim
5 words
The compound which is 5,7-dimethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 5
Dependent Claim
5 words
The compound which is 7-ethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 6
Dependent Claim
5 words
The compound which is 7-ethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 7
Dependent Claim
5 words
The compound which is 7-6,7-diethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 8
Dependent Claim
5 words
The compound which is 7-6,7-diethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 9
Dependent Claim
5 words
The compound which is 6,7-dimethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
Claim 10
Dependent Claim
5 words
The compound which is 6,7-dimethyl-4-hydroxy-3-nitro-5,6,7,8-tetrahydrocarbostyril.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |