US3817745A
Expired / Lapsed
US
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Use of polymeric complex for recovering metals
Assignee: ISP Investments LLC
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Filing: 1971-12-15
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Granted: 1974-06-18
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Expires: 1991-12-15
Abstract
Abstract A PROCESS FOR RECOVERING NOBLE METALS FROM A SOLUTION CONTAINING NOBLE METAL IONS BY TREATING SAID SOLUTION WITH A COMPLEX OF A CROSS-LINKED POLYMERIC N-VINYLAMIDE AND A POLYHYDROXYARYL COMPOUND.
Inventors
- 👤 J Copes
- 👤 D Lorenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:30
CPC Classifications
C; C01; C01G; C01G7/00; C01G7/003; B; B01; B01J; B01J45/00; C01G5/00; C01G5/003; C01G55/00; C01G55/001; C22; C22B; C22B3/00; C22B3/20; C22B3/22; C22B3/24; B01J23/00; B01J23/38; B01J27/00; B01J27/06; B01J27/08; B01J27/10; B01J27/24; B01J27/25; B01J31/00; B01J31/02; B01J31/06; Y; Y02; Y02P; Y02P10/00; Y02P10/20
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |