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US3017420A
Expired / Lapsed
US
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Preparation of organic isocyanates
Assignee: Union Oil Company of California
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Filing: 1957-10-25
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Granted: 1962-01-16
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Expires: 1977-10-25
Abstract
No abstract record available.
Inventors
- 👤 William D Schaeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:20
CPC Classifications
C; C07; C07C; C07C263/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR PREPARING AN ORGANIC ISOCYANATE WHICH COMPRISES REACTING A HYDROCARBYL HALIDE CONTAINING A HALOGEN ATOM BONDED TO AN ALKYL CARBON ATOM AND NOT MORE THAN ONE HALOGEN ATOM ON ANY ONE CARBON ATOM, WITH A CYANATE OF A METAL SELECTED FROM THE CLASS CONSISTING OF THE ALKALI METALS AND ALKALINE EARTH METALS, SAID REACTION BEING CONDUCTED BETWEEN ABOUT 25* AND 250* C., IN THE PRESENCE OF A SOLVENT CONSISTING ESSENTIALLY OF A HYDROCARBYL SULFONATE WHEREIN THE HYDROCARBYL RADICALS ARE SELECTED FROM THE CLASS CONSISTING OF ALKYL, NAPHTHENYL AND ARYL, AND RECOVERING ORGANIC ISOCYANATE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
99 words
A PROCESS FOR PREPARING AN ORGANIC ISOCYANATE WHICH COMPRISES REACTING A HYDROCARBYL HALIDE CONTAINING A HALOGEN ATOM BONDED TO AN ALKYL CARBON ATOM AND NOT MORE THAN ONE HALOGEN ATOM ON ANY ONE CARBON ATOM, WITH A CYANATE OF A METAL SELECTED FROM THE CLASS CONSISTING OF THE ALKALI METALS AND ALKALINE EARTH METALS, SAID REACTION BEING CONDUCTED BETWEEN ABOUT 25* AND 250* C., IN THE PRESENCE OF A SOLVENT CONSISTING ESSENTIALLY OF A HYDROCARBYL SULFONATE WHEREIN THE HYDROCARBYL RADICALS ARE SELECTED FROM THE CLASS CONSISTING OF ALKYL, NAPHTHENYL AND ARYL, AND RECOVERING ORGANIC ISOCYANATE FROM THE REACTION MIXTURE.
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) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |