Patent US2647120A successfully refreshed from Google Patents.
US2647120A
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5-nitro-2-thiophenecarboxamides
Assignee: EIDP Inc
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Filing: 1949-12-14
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Granted: 1953-07-28
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Expires: 1969-12-14
Abstract
No abstract record available.
Inventors
- 👤 Thurmond A Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:44
CPC Classifications
C; C07; C07D; C07D405/00; C07D405/02; C07D405/12; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/42; C07D333/44; C07D417/00; C07D417/02; C07D417/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
6 words
A 5-NITRO-2-THIOPENECARBOXAMIDE REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
6 words
A 5-NITRO-2-THIOPENECARBOXAMIDE REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
64 words
A PROCESS FOR THE PREPARATION OF A 5-NITRO2-THIOPHENECARBOXAMIDE WHICH COMPRISES REACTING A 5-NITRO-2-THIOPHENECARBOXYLYL HALIDE IN THE PRESENCE OF A BASIC SOLVENT WITH AN AMINE OF A 5 TO 6 MEMBER N-HETEROCYCLIC RING COMPOUND REPRESENTED BY THE FORMULA RNH2, WHERE R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF PYRRYL, PYRAZOLYL, IMIDAZOLYL, PYRIDYL, PYRIMIDYL, PYRIDAZYL, INDYL, PIPERIDYL, PYRAZINYL, PYRAZOLIDYL PYRIDONYL, PIPERAZYL, THIAZOLYL, AND CARBOXYPYRIDYL.
Claim 4
Dependent Claim
64 words
A PROCESS FOR THE PREPARATION OF A 5-NITRO2-THIOPHENECARBOXAMIDE WHICH COMPRISES REACTING A 5-NITRO-2-THIOPHENECARBOXYLYL HALIDE IN THE PRESENCE OF A BASIC SOLVENT WITH AN AMINE OF A 5 TO 6 MEMBER N-HETEROCYCLIC RING COMPOUND REPRESENTED BY THE FORMULA RNH2, WHERE R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF PYRRYL, PYRAZOLYL, IMIDAZOLYL, PYRIDYL, PYRIMIDYL, PYRIDAZYL, INDYL, PIPERIDYL, PYRAZINYL, PYRAZOLIDYL PYRIDONYL, PIPERAZYL, THIAZOLYL, AND CARBOXYPYRIDYL.
References Cited (Backward Citations)
US2505253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |