Patent US6294953B1 successfully refreshed from Google Patents.
US2773086A
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US
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Production of isocyanates from substituted ureas
Assignee: Monsanto Chemicals Ltd
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Filing: 1953-01-19
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Granted: 1956-12-04
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Expires: 1973-01-19
Abstract
No abstract record available.
Inventors
- 👤 Robert J Slocombe
- 👤 James H Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:38
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/06; C07C269/00; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
45 words
THE METHOD OF PREPARING MONOCARBAMYL CHLORIDES AND THE CORRESPONDING ISOCYANIC ACID ESTERS, WHICH COMPRISES REACTING, IN THE VAPOR PHASE AND AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 300* C. TO ABOUT 500* C., HYDROGEN CHLORIDE AND A DISUBSTITUTED UREA OF THE FOLLOWING GENERAL 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) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |