US3700671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chelating compositions
Assignee: Individual
•
Filing: 1968-12-30
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Granted: 1972-10-24
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Expires: 1988-12-30
Abstract
Abstract TRIAZINE COMPOUNDS ARE DISCLOSED WHICH ARE DERIVATIVES OF SYMMETRICAL TRIAZINE HAVING 1, 2 OR 3 RADICALS OF THE STRUCTURE -O-CH(-R4)-(CH(-R4)N-N(-R2)2 OR -O-Z-N(-R2)2 THERE BEING AT LEAST ONE METAL COORDINATING GROUP OF THE STRUCTURE -CHR4COOM, WHEREIN M,Z,R2,R3 AND R4 ARE AS DEFINED HEREINAFTER. THESE COMPOUNDS ARE USEFUL FOR COORDINATING WITH AND REMOVING METALS FROM SOLUTIONS OR FOR PREPARING RESINS CAPABLE OF REMOVING METALS FROM SOLUTIONS.
Inventors
- 👤 Gaetano F D Alelio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:00
CPC Classifications
C; C08; C08G; C08G85/00; B; B01; B01J; B01J45/00; C07; C07F; C07F1/00; C07F1/005; C07F9/00; C07F9/02; C07F9/547; C07F9/6515; C07F9/6521; C08B; C08B15/00; C08B15/05; C08B15/06; C08F; C08F8/00; C08F8/30; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/26; C08G63/00; C08G63/68; C08G63/685; C08G69/00; C08G69/02; C08G69/26
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) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |