US3301866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted indenopyridines
Assignee: Dart Industries Inc
•
Filing: 1965-08-12
•
Granted: 1967-01-31
•
Expires: 1985-08-12
Abstract
No abstract record available.
Inventors
- 👤 Marshall D Draper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:39
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/04; C07D221/06; C07D221/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
2-LOWER ALKYL-9-OXO-4A-PHENYL-1,2,3,4,4A,9A-HEXAHYDRO-9H-INDENO(2,1-C)PYRIDINE. 5. 2-LOWER CYCLOALKYL-9-OXO-4A-PHENYL-1,2,3,4,4A,9AHEXAHYDRO-9H-INDENO(2,1-C) PYRIDINE.
Claim 2
Dependent Claim
6 words
2-LOWER ALKYL-9-OXO-4A-PHENYL-1,2,3,4,4A,9A-HEXAHYDRO-9H-INDENO(2,1-C)PYRIDINE. 5. 2-LOWER CYCLOALKYL-9-OXO-4A-PHENYL-1,2,3,4,4A,9AHEXAHYDRO-9H-INDENO(2,1-C) PYRIDINE.
References Cited (Backward Citations)
US2546652A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |