US3849403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,3,4,5-tetrahydro-1,1,5,5-tetrasubstituted-1h-3-benzazepines
Assignee: Wyeth LLC
•
Filing: 1972-03-29
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Granted: 1974-11-19
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Expires: 1992-03-29
Abstract
Abstract 1. A COMPOUND OF THE FORMULA 1,1-(-R1-R2-),5,5-(-R1-R2-)-2,3,4,5-TETRAHYDRO-1H-3- BENZAZEPINE WHEREIN R1 AND R2, INDEPENDENTLY, ARE (LOWER)ALKYL OR, TAKEN TOGETHER, ARE -(CH2)N- WHEREIN N IS A WHOLE NUMBER OF FROM 2 TO 6.
Inventors
- 👤 J Yardley
- 👤 R Rees
- 👤 H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:48
CPC Classifications
C; C07; C07D; C07D223/00; C07D223/14; C07D223/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
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) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |