US2527240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of organic polycarbamates from chloroformic esters
Assignee: Imperial Chemical Industries Ltd
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Filing: 1947-07-01
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Granted: 1950-10-24
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Expires: 1967-07-01
Abstract
No abstract record available.
Inventors
- 👤 Baird William
- 👤 Gaubert Peter
- 👤 Lowe Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:54
CPC Classifications
C; C07; C07C; C07C271/00; C07C271/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
40 words
A PROCESS FOR THE MANUFACTURE OF ORGANIC TRISCARBAMATES FROM CHLOROFORMIC ESTERS WHICH COMPRISES REACTING AMMONIA WITH THE CHLOROFORMIC ESTER OBTAINED BY INTERACTION OF PHOSGENE WITH A GLYCERYL COMPOUND SELECTED FROM THE GROUP CONSISTING OF CASTOR OIL AND HYDROGENATED CASTOR OIL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-23 | 1954-04-24 | 1954-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-23 | 1958-04-24 | 1958-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-23 | 1962-04-24 | 1962-10-24 | $7700.00 | Window Closed / Lapsed |