US2822373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amine
Assignee: —
•
Filing: —
•
Granted: 1958-02-04
•
Expires: 1975-02-04
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/10; C07C265/00; C07C265/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A CONTINUOUS FLOW PROCESS OF MANUFACTURING ORGANIC ISOCYANATES FROM ORGANIC PRIMARY AMINES AND PHOSGENE, THE STEP WHICH COMPRISES PASSING AN INERT ORGANIC SOLVENT SOLUTION OF THE AMINE INTO AN INERT ORGANIC SOLVENT SOLUTION OF PHOSGENE UNDER SUPERATMOSPHERIC PRESSURE AND UNDER CONDITIONS OF TURBULENT FLOW WHILE MAINTAINING THE TEMPERATURE ABOVE THAT AT WHICH THE CARBAMYL CHLORIDE OF THE PARTICULAR AMINE EMPLOYED IS DECOMPOSED AND WITHIN THE RANGE OF FROM 90*C. TO 180*C., THE AMOUNT OF PHOSGENE EMPLOYED BEING AT LEAST 1.25 MOLS PER NH2 GROUP ON THE AMINE, THE ORGANIC AMINE BEING ONE WHICH CONTAINS NO OTHER GROUP THAN -NH2 WHICH IS REACTIVE WITH PHOSGENE.
Claim 2
Dependent Claim
105 words
IN A CONTINUOUS FLOW PROCESS OF MANUFACTURING ORGANIC ISOCYANATES FROM ORGANIC PRIMARY AMINES AND PHOSGENE, THE STEP WHICH COMPRISES PASSING AN INERT ORGANIC SOLVENT SOLUTION OF THE AMINE INTO AN INERT ORGANIC SOLVENT SOLUTION OF PHOSGENE UNDER SUPERATMOSPHERIC PRESSURE AND UNDER CONDITIONS OF TURBULENT FLOW WHILE MAINTAINING THE TEMPERATURE ABOVE THAT AT WHICH THE CARBAMYL CHLORIDE OF THE PARTICULAR AMINE EMPLOYED IS DECOMPOSED AND WITHIN THE RANGE OF FROM 90*C. TO 180*C., THE AMOUNT OF PHOSGENE EMPLOYED BEING AT LEAST 1.25 MOLS PER NH2 GROUP ON THE AMINE, THE ORGANIC AMINE BEING ONE WHICH CONTAINS NO OTHER GROUP THAN -NH2 WHICH IS REACTIVE WITH PHOSGENE.
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) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |