US3822223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparing polyurethanes with a dialkyl tin carboxylate/tertiary amine catalyst combination
Assignee: Baychem Corp
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Filing: 1971-01-06
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Granted: 1974-07-02
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Expires: 1991-01-06
Abstract
Abstract A POLYURETHANE FOAM IS PREPARED BY A PROCESS IN WHICH A POLYALKYLENE ETHER POLYOL IS REACTED WITH AN ORGANIC POLYISOCYANATE WITH A CATALYST WHICH COMBINES AN ORGANO-TIN COMPOUND WITH A TERTIARY AMINE.
Inventors
- 👤 P Gemeinhardt
- 👤 J Britain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/161; C08G18/163; C08G18/165; C08G18/18; C08G18/20; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083
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) | 1977-07-01 | 1977-12-31 | 1978-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-01 | 1981-12-31 | 1982-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-01 | 1985-12-31 | 1986-07-02 | $7700.00 | Window Closed / Lapsed |