US3840537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imidazo(5,1-f)triazinones
Assignee: Allen and Hanburys Ltd
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Filing: 1972-10-25
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Granted: 1974-10-08
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Expires: 1992-10-25
Abstract
Abstract 1. A A COMPOUND OF THE FORMULA I: 2-(R1-N(-R2)-),3-R3,4-(O=),5-R4,7-R5-IMIDAZO(5,1-F) TRIAZINE OR A PHYSIOLOGICALLY ACCEPTABLE SALT THEREOF WHEREIN R2 AND R3 MAY BE THE SAME OR DIFFERENT AND EACH REPRESENTS A HYDROGEN ATOM OR A STRAIGHT OR BRANCHED CHAIN ALKYL OR ALKENYL RADICAL CONTAINING FROM 1 TO 6 CARBON ATOMS OR SUCH A RADICAL SUBSTITUTED BY AT LEAST ONE PHENYL GROUP, R1 IS AS DEFINED FOR R2 AND R3 OR A C1-C6 ALKANOLY GROUP, AND R4 AND R5 ARE AS DEFINED FOR R2 AND R3 OR A C3-C7 CYCLOALKYL, OR PHENYL GROUP.
Inventors
- 👤 S Garside
- 👤 D Hartley
- 👤 H Lunts
- 👤 A Oxford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:30
CPC Classifications
C; C07; C07D; C07D253/00; C07D253/02; C07D253/06; C07D253/065; C07D253/07; C07D253/075; A; A61; A61P; A61P17/00; A61P7/00; A61P7/10; A61P9/00; A61P9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
7 words
A A COMPOUND OF THE FORMULA I:
Claim 2
Dependent Claim
7 words
A A COMPOUND OF THE FORMULA I:
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |