US3781229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage stable premix for production of polyurethane foam
Assignee: General Electric Co
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Filing: 1972-10-31
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Granted: 1973-12-25
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Expires: 1992-10-31
Abstract
Abstract A METHOD FOR MAKING RIGID FOAM IS PROVIDED BY USING AN AMINE CATALYST AND BLOWING AGENT WITH A STABLE PREMIX OF AN ISOCYANATE TERMINATED PREPOLYMER AND AN EPOXY RESIN. THE PREMIX IS STABILIZED BY THE USE OF AN EFFECTIVE AMOUNT OF CERTAIN LEWIS ACID STABILIZERS, SUCH AS THIONYL CHLORIDE.
Inventors
- 👤 W Smith
- 👤 C Orlando
- 👤 R Barito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:44
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089; C08G18/10; C08G2110/00; C08G2110/0025
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |