US2866803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organic isocyanates
Assignee: Ethyl Corp
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Filing: 1955-12-27
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Granted: 1958-12-30
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Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Pree David O De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:42
CPC Classifications
C; C07; C07C; C07C263/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR THE PREPARATION OF ORGANIC ISOCYANATES, WHICH COMPRISES REACTING AT A TEMPERATURE BELOW ABOUT 230*C. A METAL CYANATE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL CYANATES WITH AN ORGANIC HALIDE SELECTED FROM THE GROUP CONSISTING OF ALKYL, ALKENYL, ARALKYL, AND ARALKENYL HALIDES HAVING AT LEAST ONE HYDROGEN ATOM ON THE HALOGEN SUBSTITUTED CARBON ATOM IN THE PRESENCE OF A TERTIARY HYDROCARBON AMINE FOR A PERIOD BETWEEN ABOUT 0.5 AND 25 MINUTES.
Claim 2
Dependent Claim
77 words
A PROCESS FOR THE PREPARATION OF ORGANIC ISOCYANATES, WHICH COMPRISES REACTING AT A TEMPERATURE BELOW ABOUT 230*C. A METAL CYANATE SELECTED FROM THE GROUP CONSISTING OF ALKALI AND ALKALINE EARTH METAL CYANATES WITH AN ORGANIC HALIDE SELECTED FROM THE GROUP CONSISTING OF ALKYL, ALKENYL, ARALKYL, AND ARALKENYL HALIDES HAVING AT LEAST ONE HYDROGEN ATOM ON THE HALOGEN SUBSTITUTED CARBON ATOM IN THE PRESENCE OF A TERTIARY HYDROCARBON AMINE FOR A PERIOD BETWEEN ABOUT 0.5 AND 25 MINUTES.
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) | 1961-12-29 | 1962-06-30 | 1962-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-29 | 1966-06-30 | 1966-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-29 | 1970-06-30 | 1970-12-30 | $7700.00 | Window Closed / Lapsed |