US2642438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyridindoles and method of manufacture
Assignee: F Hoffmann La Roche AG
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Filing: 1949-07-15
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Granted: 1953-06-16
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Expires: 1969-07-15
Abstract
No abstract record available.
Inventors
- 👤 Duschinsky Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:52
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A COMPOUND OF THE GROUP CONSISTING OF 9 - R-2-R1 - 1,2,3,4 - TERTRAHYDRO -9H - PYRID(3,4-B) INDOLE WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF MONOCYCLIC ARYL AND MONOCYCLIC ARALKYL RADICALS OF THE BENZENE SERIES, AND R1 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL RADICALS, AND LOWER ALKYL QUATERNARY SALTS AND ACID ADDITION SALTS THEREOF.
Claim 2
Dependent Claim
63 words
A COMPOUND OF THE GROUP CONSISTING OF 9 - R-2-R1 - 1,2,3,4 - TERTRAHYDRO -9H - PYRID(3,4-B) INDOLE WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF MONOCYCLIC ARYL AND MONOCYCLIC ARALKYL RADICALS OF THE BENZENE SERIES, AND R1 IS A MEMBER OF THE GROUP CONSISTING OF HYDROGEN AND LOWER ALKYL RADICALS, AND LOWER ALKYL QUATERNARY SALTS AND ACID ADDITION SALTS THEREOF.
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) | 1956-06-15 | 1956-12-15 | 1957-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-15 | 1960-12-15 | 1961-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-15 | 1964-12-15 | 1965-06-16 | $7700.00 | Window Closed / Lapsed |