US2866788A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of indolo [2, 3-c] quinazo [3, 2-a] pyridine derivatives
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1956-10-18
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Granted: 1958-12-30
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Expires: 1976-10-18
Abstract
No abstract record available.
Inventors
- 👤 Irwin J Pachter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:23
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/12; C07D471/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
THE METHOD OF FORMING COMPOUNDS HAVING THE FOLLOWING FORMULA:
Claim 2
Independent Claim
9 words
THE METHOD OF FORMING COMPOUNDS HAVING THE FOLLOWING 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) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |