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US3929787A
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6,7,8,9-Tetrahydro-pyrido(1,2-a)pyrimidin-4-ones
Assignee: ER Squibb and Sons LLC
•
Filing: 1974-04-22
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Granted: 1975-12-30
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Expires: 1994-04-22
Abstract
Abstract 6,7,8,9-Tetrahydro-2-aryl-9-alkyl-4H-pyrido(1,2-a)-pyrimidin-4ones, processes for their preparation, and methods for their use are disclosed herein.
Inventors
- 👤 Harry Louis Yale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:12
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE STRUCTURE
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE STRUCTURE
Claim 3
Dependent Claim
11 words
A compound in accordance with claim 1 wherein R1 is phenyl.
Claim 4
Dependent Claim
11 words
A compound in accordance with claim 1 wherein R2 is hydrogen.
Claim 5
Dependent Claim
11 words
A compound in accordance with claim 1 wherein R2 is alkyl.
Claim 6
Dependent Claim
12 words
The compound in accordance with claim 1 having the name 6,7, 8,9-tetrahydro-9-methyl-2-phenyl-4H-pyrido(1,2-a)pyrimidin-4-one.
References Cited (Backward Citations)
US3585198A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |