Patent US3139449A successfully refreshed from Google Patents.
US3139449A
Expired / Lapsed
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Process for preparing organic isothiocyanate using phosphorus-containing catalysts
Assignee: EIDP Inc
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Filing: 1961-02-07
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Granted: 1964-06-30
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Expires: 1981-02-07
Abstract
No abstract record available.
Inventors
- 👤 Ahramjian Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:29
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0234; B01J31/0255; B01J31/0257; B01J31/0262; B01J31/0261; C; C07; C07C; C07C331/00; C07C331/16; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/547; C07F9/6564; C07F9/6568; C07F9/65685; C08; C08G; C08G18/00; C08G18/06; C08G18/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR PREPARING AN ORGANIC ISOTHIOCYANATE WHICH COMPRISES HEATING AN ORGANIC ISOCYANATE HAVING NO ACTIVE HYDROGEN-CONTAINING SUBSTITUENTS WHICH ARE REACTIVE WITH AN ISOCYANATO GROUP AND AT LEAST ONE MOLECULE OF CARBON DISULFIDE FOR EACH ISOCYANATO GROUP AT A TEMPERATURE OF ABOUT 100 TO 400*C. IN THE PRESENCE OF FROM ABOUT 0.01 TO 10.0 PARTS BY WEIGHT OF A PHOSPHORUS COMPOUND PER 100 PARTS BY WEIGHT OF SAID ISOCYANATE COMPOUND,SAID PHOSPHORUS COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF A SUBSTITUTED PHOSPHOLINE HAVING THE FORMULA
Claim 2
Dependent Claim
85 words
A PROCESS FOR PREPARING AN ORGANIC ISOTHIOCYANATE WHICH COMPRISES HEATING AN ORGANIC ISOCYANATE HAVING NO ACTIVE HYDROGEN-CONTAINING SUBSTITUENTS WHICH ARE REACTIVE WITH AN ISOCYANATO GROUP AND AT LEAST ONE MOLECULE OF CARBON DISULFIDE FOR EACH ISOCYANATO GROUP AT A TEMPERATURE OF ABOUT 100 TO 400*C. IN THE PRESENCE OF FROM ABOUT 0.01 TO 10.0 PARTS BY WEIGHT OF A PHOSPHORUS COMPOUND PER 100 PARTS BY WEIGHT OF SAID ISOCYANATE COMPOUND,SAID PHOSPHORUS COMPOUND BEING SELECTED FROM THE GROUP CONSISTING OF A SUBSTITUTED PHOSPHOLINE HAVING THE FORMULA
References Cited (Backward Citations)
US2681358A
Cited
US2894013A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |