US4020106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal extraction process
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-08-12
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Granted: 1977-04-26
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Expires: 1995-08-12
Abstract
Abstract Salicylaldoximes having a total of at least three alkyl carbon atoms contained in one or more nuclear substituents are used to extract metals from aqueous solutions of their salts as complex compounds soluble in water-immiscible organic solvents. The salicylaldoximes are prepared from the corresponding salicylaldehydes by reaction with hydroxylamine.
Inventors
- 👤 Norman Ackerley
- 👤 Peter Albert Mack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:04
CPC Classifications
C; C01; C01G; C01G3/00; C22; C22B; C22B3/00; C22B3/20; C22B3/26; C22B3/30; C01G3/003; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
15 words
A mixture of 5-nonyl-2-hydroxy benzaldoximes wherein the nonyl is a mixture of branched chain isomers.
Claim 2
Dependent Claim
15 words
A mixture of 5-nonyl-2-hydroxy benzaldoximes wherein the nonyl is a mixture of branched chain isomers.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |