US3706687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethane foam production and catalyst therefor comprising a mixture of an aliphatic tertiary amine compound and a tertiary amine salt of an alkylarylsulfonic acid
Assignee: HENRYK S RUDZKI
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Filing: 1970-08-19
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Granted: 1972-12-19
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Expires: 1990-08-19
Abstract
Abstract PRODUCTION OF POLYURETHANE FOAMS BY REACTION OF AT LEAST ONE POLYFUNCTIONAL ISOCYANATE COMPOUND WITH AT LEAST ONE POLYFUNCTIONAL COMPOUND CONTAINING AN ACTIVE HYDROGEN GROUP IN THE PRESENCE OF A NOVEL CATALYST COMPOSITION COMPRISING A PARTICULAR MIXTURE OF AT LEAST ONE ALIPHATIC AMINE AND AT LEAST ONE ALKYLARYLSULFONIC ACID WHICH HAS BEEN NEUTRALIZED WITH A TERTAIRY AMINE AND ALSO IN THE PRESENCE OF A BLOWING AGENT FOR THE REACTION.
Inventors
- 👤 Henryk S Rudzki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:22
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1875
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |