US2838511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of triaryl isocyanates
Assignee: EIDP Inc
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Filing: 1955-10-31
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Granted: 1958-06-10
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Expires: 1975-10-31
Abstract
No abstract record available.
Inventors
- 👤 Kogon Irving Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:05
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5046; C08G59/5053; C08G59/508; C08G59/5086
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A PROCESS FOR PREPARING TRIARYL ISOCYRANURATES WHICH COMPRISES HEATING A COMPOUND OF THE CLASS CONSISTING OF PHENYL ISOCYANATE, SUBSTITUTED PHENYL ISOCYANATE, NAPHTHYL ISOCYANATE AND DIMERS THEREOF WITH A COMPOUND OF THE CLASS CONSISTING OF ARYL URETHANES AND DIARYL ALLOPHANATES, THE ARYL RADICAL IN EACH CASE BEING A MEMBER OF THE GROUP CONSISTING OF PHENYL, SUBSTITUTED PHENYL, AND NAPHTHYL, AT A TEMPERATURE OF FROM 70* TO 200*C., IN THE PRESENCE OF FROM 1 TO 5% BY WEIGHT, OF A TERITARY AMINE CATALYST, SAID TERITARY AMINE CATALYST HAVING A BOILING POINT OF AT LEAST 100*C., THE MOL RATIO OF SAID ISOCYANATES AND DIMERS THEREOF TO SAID ARYL URETHANE BEING AT LEAST 1:1, AND, THE MOL RATIO OF SAID PHENYL ISOCYANATE, SUBSTITUTED PHENYL ISOCYANATES AND NAPHTHYL ISOCYANATES TO SAID DIARYL ALLOPHANATE BEING AT LEAST 2:1, THE MOL RATIO OF SAID ISOCYANATE DOMERS TO SAID DIARYL ALLOPHANATE BEING AT LEAST 1:1, SAID PHENYL SUBSTITUENTS BEING NON-REACTIVE WITH ISOCYANATE GROUPS.
Claim 2
Dependent Claim
155 words
A PROCESS FOR PREPARING TRIARYL ISOCYRANURATES WHICH COMPRISES HEATING A COMPOUND OF THE CLASS CONSISTING OF PHENYL ISOCYANATE, SUBSTITUTED PHENYL ISOCYANATE, NAPHTHYL ISOCYANATE AND DIMERS THEREOF WITH A COMPOUND OF THE CLASS CONSISTING OF ARYL URETHANES AND DIARYL ALLOPHANATES, THE ARYL RADICAL IN EACH CASE BEING A MEMBER OF THE GROUP CONSISTING OF PHENYL, SUBSTITUTED PHENYL, AND NAPHTHYL, AT A TEMPERATURE OF FROM 70* TO 200*C., IN THE PRESENCE OF FROM 1 TO 5% BY WEIGHT, OF A TERITARY AMINE CATALYST, SAID TERITARY AMINE CATALYST HAVING A BOILING POINT OF AT LEAST 100*C., THE MOL RATIO OF SAID ISOCYANATES AND DIMERS THEREOF TO SAID ARYL URETHANE BEING AT LEAST 1:1, AND, THE MOL RATIO OF SAID PHENYL ISOCYANATE, SUBSTITUTED PHENYL ISOCYANATES AND NAPHTHYL ISOCYANATES TO SAID DIARYL ALLOPHANATE BEING AT LEAST 2:1, THE MOL RATIO OF SAID ISOCYANATE DOMERS TO SAID DIARYL ALLOPHANATE BEING AT LEAST 1:1, SAID PHENYL SUBSTITUENTS BEING NON-REACTIVE WITH ISOCYANATE GROUPS.
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) | 1961-06-09 | 1961-12-09 | 1962-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-09 | 1965-12-09 | 1966-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-09 | 1969-12-09 | 1970-06-10 | $7700.00 | Window Closed / Lapsed |