US2842553A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing imidazolidinethiones
Assignee: Monsanto Chemicals Ltd
•
Filing: 1955-07-13
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Granted: 1958-07-08
•
Expires: 1975-07-13
Abstract
No abstract record available.
Inventors
- 👤 John D Christian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:57
CPC Classifications
C; C07; C07D; C07D235/00; C07D235/02; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
AN IMPROVED PROCESS FOR THE PREPARATION OF IMIDAZOLIDINETHIONES WHICH COMPRISES HEATING TOGETHER AT LEAST EQUIMOLECULAR PROPORTIONS OF A KETONE CYANOHYDRIN OF THE FORMULA RR''C-(OH)CN WHEREIN R AND R'' ARE CHOSEN FROM THE GROUP CONSISTING OF UNSUBSTITUTED ALKYL, CYCLOALKYL, ARYL, ALKARYL, AND ARALKYL RADICAL WITH ITS CORRESPONDING KETONE OF THE FORMULA
Claim 2
Dependent Claim
50 words
AN IMPROVED PROCESS FOR THE PREPARATION OF IMIDAZOLIDINETHIONES WHICH COMPRISES HEATING TOGETHER AT LEAST EQUIMOLECULAR PROPORTIONS OF A KETONE CYANOHYDRIN OF THE FORMULA RR''C-(OH)CN WHEREIN R AND R'' ARE CHOSEN FROM THE GROUP CONSISTING OF UNSUBSTITUTED ALKYL, CYCLOALKYL, ARYL, ALKARYL, AND ARALKYL RADICAL WITH ITS CORRESPONDING KETONE OF THE 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) | 1961-07-07 | 1962-01-06 | 1962-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-07 | 1966-01-06 | 1966-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-07 | 1970-01-06 | 1970-07-08 | $7700.00 | Window Closed / Lapsed |