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US3580950A
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Chelating compositions based on chelating acids and amines
Assignee: Individual
•
Filing: 1967-11-01
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Granted: 1971-05-25
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Expires: 1987-11-01
Abstract
Abstract CHELATING ACIDS BASED ON THE SYNTHETIC POLYAMINO POLYCARBOXYLIC ACIDS ARE REACTED WITH AMINO COMPOUNDS, SUCH AS ETHYLENE DIAMINE, ETHANOLAMINE, HEXAMETHYLENE DIAMINE, AND POLYAMINES OF SUCH LINEAR STRUCTURE TO FORM REACTION PRODUCTS CARRYING AMINO STRUCTURES IN RELATION TO THE SYNTHETIC AMINO ACID STARTING MATERIAL, SUCH THAT EFFECTIVE CHELATORS FOR IRON AND OTHER TRANSITION METALS ARE FORMED.
Inventors
- 👤 Frederick C Bersworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:18
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/32; C02; C02F; C02F5/00; C02F5/08; C02F5/10; C02F5/12
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |