US3824240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unsymmetrically-substituted-s-triazines
Assignee: BASF Corp
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Filing: 1972-12-29
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Granted: 1974-07-16
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Expires: 1992-12-29
Abstract
Abstract NOVELUNSYMMERTICALLY-SUBSTITUTED TRIAZINES CORRESPONDING TO THE FORMULA: 2-(HO-C(-R)2-C(-R)2-N(-R'')-),4,6-DI(A-)-S-TRIAZINE WHEREIN R IS HYDROGEN OR LOWER ALKYL, R'' IS LOWER ALKYL OR HYDROXYALKYL, A IS ALKOXY, ARYLOXY, ALKYL, ARYL OR --NR2" WHEREIN R" US LOWER ALKYL. THESE COMPOUNDS ARE USEFUL AS CATALYSTS FOR PREPARING RIGID CELLULAR FOAMS.
Inventors
- 👤 T Narayan
- 👤 M Cenker
- 👤 P Kan
- 👤 J Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:12
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2036; C08G18/02; C08G18/025; C08G18/28; C08G18/30; C08G18/38; C08G18/3819; C08G18/3842; C08G18/3851; C08G2115/00
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |