US2866801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production 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
- 👤 Chester M Himel
- 👤 Lawrence M Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:14
CPC Classifications
C; C07; C07C; C07C263/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 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 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 LIQUID AND ESSENTIALLY INERT TERTIARY AMIDE IN WHICH THE SOLE NITROGEN ATOM IS BONDED ONLY TO CARBON ATOMS AS A SOLVENT FOR A PERIOD BETWEEN ABOUT 0.5 MINUTES TO 24 HOURS.
Claim 2
Dependent Claim
95 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 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 LIQUID AND ESSENTIALLY INERT TERTIARY AMIDE IN WHICH THE SOLE NITROGEN ATOM IS BONDED ONLY TO CARBON ATOMS AS A SOLVENT FOR A PERIOD BETWEEN ABOUT 0.5 MINUTES TO 24 HOURS.
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 |