US3703484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foam process using distannoxane/aminoalcohol catalyst combination
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1970-12-02
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Granted: 1972-11-21
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Expires: 1990-12-02
Abstract
Abstract NON-YELLOWING FLEXIBLE POLYURETHANE FOAM IS PREPARED BY REACTING DIMETHYLBENZENE W,W''-DIISOCYANATE AND POLYOL IN THE PRESENCE OF A BLOWING AGENT, MONOAMINO ALCOHOL HAVING 1 TO 4 CARBON ATOMS AND OCTAALKY-STANNOXANE CATALYST.
Inventors
- 👤 Akizo Keshi
- 👤 Kunio Yoshii
- 👤 Makoto Yokoo
- 👤 Kaichi Nakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:19
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C08G18/22; C08G18/24; C08G18/242; C08G18/28; C08G18/65; C08G18/66; C08G18/6633; C08G18/6637; C08G18/6648; C08G18/6655; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7614; C08G18/7628; C08G18/7642; C08J; C08J9/00; C08J9/0014; C08J9/0052; C08G2110/00; C08G2110/0008; C08G2110/0041; C08G2110/005; C08G2110/0083; C08J2375/00; C08J2375/04
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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |