Patent US2866802A successfully refreshed from Google Patents.
US2866802A
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
- 👤 Graham Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:29
CPC Classifications
C; C07; C07C; C07C263/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 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 CONSISTIG OF ALKYL, ALKENYL, ARALKYL, AND ARALKENYL HALIDES HAVING AT LEAST ONE HYDROGEN ATOM ON THE HALOGEN SUBSTITUTED CARBON ATOM FOR A PERIOD BETWEEN ABOUT 0.5 MINUTE TO 24 HOURS IN THE PRESENCE OF A QUATERNARY AMMONIUM HALIDE HAVING THE FORMULA (R)4-N-X, WHEREIN R IS A MONOVALENT HYDROCARBON RADICAL HAVING UP TO ABOUT 18 CARBON ATOMS AND X IS A HALOGEN AND WHICHIS IN THE LIQUID STATE UNDER THE REACTION CONDITIONS AS A CATALYST.
Claim 2
Dependent Claim
114 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 CONSISTIG OF ALKYL, ALKENYL, ARALKYL, AND ARALKENYL HALIDES HAVING AT LEAST ONE HYDROGEN ATOM ON THE HALOGEN SUBSTITUTED CARBON ATOM FOR A PERIOD BETWEEN ABOUT 0.5 MINUTE TO 24 HOURS IN THE PRESENCE OF A QUATERNARY AMMONIUM HALIDE HAVING THE FORMULA (R)4-N-X, WHEREIN R IS A MONOVALENT HYDROCARBON RADICAL HAVING UP TO ABOUT 18 CARBON ATOMS AND X IS A HALOGEN AND WHICHIS IN THE LIQUID STATE UNDER THE REACTION CONDITIONS AS A CATALYST.
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 |