Patent US2774757A successfully refreshed from Google Patents.
US2774757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of thioacylhydrazones
Assignee: Bayer AG
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Filing: 1955-07-26
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Granted: 1956-12-18
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Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 Kuhle Engelbert
- 👤 Wegler Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:29
CPC Classifications
C; C09; C09B; C09B26/00; C09B26/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE PROCESS OF PRODUCING THIOACYLHYDRAZONES WHICH COMPRISES HEATING TO TEMPERATURES OF BETWEEN ABOUT 120 TO ABOUT 180* C. A MIXTURE OF SULFUR AND A HETEROCYCLIC COMPOUND CONTAINING A REACTIVE METHYL GROUP SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF 2-AND 4-METHYLPYRIDINE, QUINALDINE, 2-METHYLBENZOTHIAZOLE, 2METHYLTHIOPHENE, 2,4-DIMETHYLPYRIDINE, 2.5-DIMETHYLPYRIDINE, AND AN ORGANIC CARBOXYLIC ACID HYDRAZIDE SELECTED FROM THE CLASS CONSISTING O FBENZOIC ACID HYDRAZIDE, THE HYDRAZIDES OF HALOGEN-SUBSTITUTED-, NITRO-SUBSTITUTEDAND ALKYL-SUBSTITUTED BENZOIC ACIDS, NAPHTHOIC ACID BY DRAZIDE, DIPHENYLCARBOXYLIC ACID HYDRAZIDE, THE PYRINDINE CARBOXYLIC ACID HYDRAZIDES, THE QUINOLINE CARBOXYLIC ACID HYDRAZIDES, PYROMUCIC ACID HYDRAZIDE AND THIOPHENECARBOXYLIC ACID HYDRAZIDE, AND RECOVERING THE THIOACYLHYDRAZONES FORMED FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
103 words
THE PROCESS OF PRODUCING THIOACYLHYDRAZONES WHICH COMPRISES HEATING TO TEMPERATURES OF BETWEEN ABOUT 120 TO ABOUT 180* C. A MIXTURE OF SULFUR AND A HETEROCYCLIC COMPOUND CONTAINING A REACTIVE METHYL GROUP SAID COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF 2-AND 4-METHYLPYRIDINE, QUINALDINE, 2-METHYLBENZOTHIAZOLE, 2METHYLTHIOPHENE, 2,4-DIMETHYLPYRIDINE, 2.5-DIMETHYLPYRIDINE, AND AN ORGANIC CARBOXYLIC ACID HYDRAZIDE SELECTED FROM THE CLASS CONSISTING O FBENZOIC ACID HYDRAZIDE, THE HYDRAZIDES OF HALOGEN-SUBSTITUTED-, NITRO-SUBSTITUTEDAND ALKYL-SUBSTITUTED BENZOIC ACIDS, NAPHTHOIC ACID BY DRAZIDE, DIPHENYLCARBOXYLIC ACID HYDRAZIDE, THE PYRINDINE CARBOXYLIC ACID HYDRAZIDES, THE QUINOLINE CARBOXYLIC ACID HYDRAZIDES, PYROMUCIC ACID HYDRAZIDE AND THIOPHENECARBOXYLIC ACID HYDRAZIDE, AND RECOVERING THE THIOACYLHYDRAZONES FORMED FROM THE REACTION MIXTURE.
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) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |