US3341462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyisocyanate compositions
Assignee: Honeywell International Inc
•
Filing: 1964-03-27
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Granted: 1967-09-12
•
Expires: 1984-03-27
Abstract
No abstract record available.
Inventors
- 👤 Shultz Andrew
- 👤 Kaplan Melvin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
C; C07; C07C; C07C263/00; C07C263/10; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/721; C08G18/727
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PROCESS FOR THE PRODUCTION OF POLYISOCYANATE COMPOSITIONS ADAPTED FOR USE IN THE PRODUCTION OF "ONESHOT" CELLULAR URETHANES BY PHOSGENATION OF TOLUENE DIAMINES IN THE PRESENCE OF A SOLVENT, TO PRODUCE A TOLUENE DIAMINE PHOSGENATION PRODUCT, THE IMPROVEMENT WHICH COMPRISES ADDING A DIFUNCTIONAL ACTIVE HYDROGEN CONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF A DIOL OR A HYDROXY TERMINATED POLYESTER THEREOF, SAID DIFUNCTIONAL ACTIVE HYDROGEN CONTAINING MATERIAL CONSISTING SOLELY OF CARBON, HYDROGEN AND OXYGEN, TO SAID TOLUENE DIAMINE PHOSGENATION PRODUCT IN AN AMOUNT WITHIN THE RANGE OF ABOUT 3% TO ABOUT 7% BY WEIGHT OF THE TOLUENE DIAMINE PHOSGENATION PRODUCT AND THEREAFTER DISTILLING SAID MIXTURE TO REMOVE VOLATILE CONSTITUENTS UNTIL THE RESULTANT DISTILLAND HAS A VISCOSITY OF AT LEAST 20 CPS. AT 25*C. AND AN AMINE EQUIVALENT WITHIN THE RANGE OF 90 AND 125.
Claim 2
Dependent Claim
135 words
IN A PROCESS FOR THE PRODUCTION OF POLYISOCYANATE COMPOSITIONS ADAPTED FOR USE IN THE PRODUCTION OF "ONESHOT" CELLULAR URETHANES BY PHOSGENATION OF TOLUENE DIAMINES IN THE PRESENCE OF A SOLVENT, TO PRODUCE A TOLUENE DIAMINE PHOSGENATION PRODUCT, THE IMPROVEMENT WHICH COMPRISES ADDING A DIFUNCTIONAL ACTIVE HYDROGEN CONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF A DIOL OR A HYDROXY TERMINATED POLYESTER THEREOF, SAID DIFUNCTIONAL ACTIVE HYDROGEN CONTAINING MATERIAL CONSISTING SOLELY OF CARBON, HYDROGEN AND OXYGEN, TO SAID TOLUENE DIAMINE PHOSGENATION PRODUCT IN AN AMOUNT WITHIN THE RANGE OF ABOUT 3% TO ABOUT 7% BY WEIGHT OF THE TOLUENE DIAMINE PHOSGENATION PRODUCT AND THEREAFTER DISTILLING SAID MIXTURE TO REMOVE VOLATILE CONSTITUENTS UNTIL THE RESULTANT DISTILLAND HAS A VISCOSITY OF AT LEAST 20 CPS. AT 25*C. AND AN AMINE EQUIVALENT WITHIN THE RANGE OF 90 AND 125.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |