US2797240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing dicyclohexylcarbodiimide
Assignee: Sanofi Aventis France
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Filing: 1956-07-02
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Granted: 1957-06-25
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Expires: 1976-07-02
Abstract
No abstract record available.
Inventors
- 👤 Amiard Gaston
- 👤 Heymes Rene
- 👤 Velluz Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:32
CPC Classifications
C; C07; C07C; C07C267/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE PROCESS OF PREPARING DICYCLOHEXYLCARBODIIMIDE WHICH COMPRISES REACTING P-TOULENE SULFOCHLORIDE IN THE PRESENCE OF A BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, METHYL ETHYL PYRIDINE, DIMETHYL PYRIDINE, DIETHYL PYRIDINE, DIPROPYL PYRIDINE, PROPLY ETHYL PYRIDENE, WITH DICYCLOHEXYLUREA AT A TEMPERATURE BETWEEN 70-80* C., COOLING THE RESULTANT PRODUCT, SEPARATING THE BASIC SALTS, REMOVING ANY UNREACTED P-TOULENE SULFOCHLORIDE AND FINALLY OBTAINING THE RESULTANT DICYCLOHEXYLCARBODIIMIDE.
Claim 2
Dependent Claim
62 words
THE PROCESS OF PREPARING DICYCLOHEXYLCARBODIIMIDE WHICH COMPRISES REACTING P-TOULENE SULFOCHLORIDE IN THE PRESENCE OF A BASE SELECTED FROM THE GROUP CONSISTING OF PYRIDINE, METHYL ETHYL PYRIDINE, DIMETHYL PYRIDINE, DIETHYL PYRIDINE, DIPROPYL PYRIDINE, PROPLY ETHYL PYRIDENE, WITH DICYCLOHEXYLUREA AT A TEMPERATURE BETWEEN 70-80* C., COOLING THE RESULTANT PRODUCT, SEPARATING THE BASIC SALTS, REMOVING ANY UNREACTED P-TOULENE SULFOCHLORIDE AND FINALLY OBTAINING THE RESULTANT DICYCLOHEXYLCARBODIIMIDE.
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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |