US3766103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of foams characterized by carbodiimide linkages
Assignee: BASF Corp
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Filing: 1972-12-29
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Granted: 1973-10-16
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Expires: 1992-12-29
Abstract
Abstract AN ADDUCT OF 1,3,5-TRIS(3-DIMETHYLAMINOPROPYL)-SHEXAHYDROTIAZINE, AN ALKYLENE OXIDE AND WATER HAS BEEN FOUND TO E EXTREMELY ACTIVE AS A CO-CATALYST USEFUL IN THE PREPARATION OF RIGID CELLULAR PLASTICS CHARACTERIZED BY CARBODIIMIDE LINKAGES.
Inventors
- 👤 P Kan
- 👤 J Patton
- 👤 M Cenker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:51
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/025; C08G18/06; C08G18/28; C08G18/40; C08G18/63; Y; Y10; Y10S; Y10S521/00; Y10S521/901
Claims Analysis
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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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |