Patent US3746709A successfully refreshed from Google Patents.
US3746709A
Expired / Lapsed
US
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Hexahydrotriazine adducts as cocatalysts for the preparation of foamscharacterized by carbodiimide linkages
Assignee: BASF Corp
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Filing: 1971-12-13
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Granted: 1973-07-17
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Expires: 1991-12-13
Abstract
Abstract THE ADDUCT OF 1,3,5-TRIS(3-DIMETHYLAMINOPROPYL)-SHEXAHYDROTRIAZINE, AN ALKYLENE OXIDE AND WATER HAS BEEN FOUND TO BE EXTREMELY ACTIVE AS A CO-CATALYST USEFUL IN THE PREPARATION OF RIGID CELLULAR PLASTICS CHARACTERIZED BY CARBODIIMIDE LINKAGES.
Inventors
- 👤 J Patton
- 👤 M Cenker
- 👤 P Kan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:55
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/02; C11D1/34; C11D1/345; B; B01; B01D; B01D19/00; B01D19/02; B01D19/04; C08; C08G; C08G18/00; C08G18/02; C08G18/025; C11D3/00; C11D3/0005; C11D3/0026; Y; Y10; Y10S; Y10S521/00; Y10S521/901; Y10S521/902
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |