US2680129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing organic diisocyanates
Assignee: Monsanto Chemicals Ltd
•
Filing: 1952-01-02
•
Granted: 1954-06-01
•
Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 Flores Hector
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:15
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THE METHOD OF PRODUCING ORGANIC DIISOCYANATES, WHICH COMPRISES REACTING PHOSGENE WITH THE HYDROCHLORIDES OF PRIMARY DIAMINES SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ALKARYL, ARALKYL, ARYL AND HYDROARYL AMINES, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 80* C. TO ABOUT 250* C. AND IN THE PRESENCE OF AN INERT CHLORINATED ORGANIC SOLVENT WHICH BOILS AT A TEMPERATURE OF FROM ABOUT 275* C. TO ABOUT 400* C.
Claim 2
Independent Claim
73 words
THE METHOD OF PRODUCING ORGANIC DIISOCYANATES, WHICH COMPRISES REACTING PHOSGENE WITH THE HYDROCHLORIDES OF PRIMARY DIAMINES SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ALKARYL, ARALKYL, ARYL AND HYDROARYL AMINES, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 80* C. TO ABOUT 250* C. AND IN THE PRESENCE OF AN INERT CHLORINATED ORGANIC SOLVENT WHICH BOILS AT A TEMPERATURE OF FROM ABOUT 275* C. TO ABOUT 400* C.
References Cited (Backward Citations)
US2326501A
Cited
US2374340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-31 | 1957-11-30 | 1958-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-31 | 1961-11-30 | 1962-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-31 | 1965-11-30 | 1966-06-01 | $7700.00 | Window Closed / Lapsed |