US2680130A
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
2026-11-03 03:35
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
THE METHOD OF PRODUCING ORGANIC DIISOCYANATES, WHICH COMPRISES REACTING PHOSGENE WITH THE HYDROCHLORIDES OF PRIMARY AMINES SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ALKARYL, ARALKYL, ARYL AND HYDROARYL DIAMINES, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 80* C. TO ABOUT 250* C. AND IN THE PRESENCE OF A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON LIQUID MIXTURE, CHARACTERIZED BY HAVING A SPECIFIC GRAVITY WITHIN THE RANGE OF 0.950 AND 1.05 AT 25* C. AND OBTAINED BY THE PARTIAL CATALYTIC HYDROGENATION OF THE MIXTURE OF NORMALLY SOLID AROMATIC HYDROCARBONS BOILING ABOVE ABOUT 340* C. AT 760 MM. PRESSURE AND FORMED IN THE SYNTHESIS OF BIPHENYL BY THE PYROLYSIS OF BENZENE AT ELEVATED TEMPERATURES.
Claim 2
Independent Claim
116 words
THE METHOD OF PRODUCING ORGANIC DIISOCYANATES, WHICH COMPRISES REACTING PHOSGENE WITH THE HYDROCHLORIDES OF PRIMARY AMINES SELECTED FROM THE CLASS CONSISTING OF ALKYL, CYCLOALKYL, ALKARYL, ARALKYL, ARYL AND HYDROARYL DIAMINES, SAID REACTION BEING CARRIED OUT AT A TEMPERATURE IN THE RANGE OF ABOUT 80* C. TO ABOUT 250* C. AND IN THE PRESENCE OF A PARTIALLY HYDROGENATED AROMATIC HYDROCARBON LIQUID MIXTURE, CHARACTERIZED BY HAVING A SPECIFIC GRAVITY WITHIN THE RANGE OF 0.950 AND 1.05 AT 25* C. AND OBTAINED BY THE PARTIAL CATALYTIC HYDROGENATION OF THE MIXTURE OF NORMALLY SOLID AROMATIC HYDROCARBONS BOILING ABOVE ABOUT 340* C. AT 760 MM. PRESSURE AND FORMED IN THE SYNTHESIS OF BIPHENYL BY THE PYROLYSIS OF BENZENE AT ELEVATED TEMPERATURES.
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 |