Patent US4028412A successfully refreshed from Google Patents.
US4028412A
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Novel chelate formers
Assignee: Merck Patent GmbH
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Filing: 1976-02-17
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Granted: 1977-06-07
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Expires: 1996-02-17
Abstract
Abstract Benzoin oximes of the formula ##STR1## wherein R 1 is alkyl of 3 to 16 carbon atoms, alkenyl of 3 or 4 carbon atoms, 3,7-dimethyl-2,6-octadienyl-1, or -A-S-R 4 ; R 2 and R 3 independently are H, methyl or chlorine; R 4 is alkyl or 1 to 8 carbon atoms; and A is alkylene of 3 or 4 carbon atoms, are chelating agents for copper.
Inventors
- 👤 Jurgen Gehlhaus
- 👤 Dietrich Erdmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:54
CPC Classifications
C; C07; C07C; C07C49/00; C07C49/76; C07C49/82; C07C49/835; C01; C01G; C01G3/00; C07C45/00; C07C45/61; C07C45/62; C07C45/67; C07C45/68; C07C49/83; Y; Y10; Y10S; Y10S423/00; Y10S423/09; Y10S423/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
45 words
A benzoin of oxime of formula ##STR7## wherein R 1 is -A-S-R 4 ; R 2 and R 3 independently are H, methyl or chlorine; R 4 is alkyl of 1 to 8 carbon atoms and A is alkylene of 3 or 4 carbon atoms.
Claim 2
Dependent Claim
45 words
A benzoin of oxime of formula ##STR7## wherein R 1 is -A-S-R 4 ; R 2 and R 3 independently are H, methyl or chlorine; R 4 is alkyl of 1 to 8 carbon atoms and A is alkylene of 3 or 4 carbon atoms.
Claim 3
Dependent Claim
27 words
A benzoin oxime of claim 1, wherein A is trimethylene; R 4 is methyl, ethyl, butyl, hexyl or octyl; and R 2 and R 3 are H.
Claim 4
Dependent Claim
19 words
A benzoin oxime of claim 1, wherein R 2 and R 3 each are H or p-CH 3 .
Claim 5
Dependent Claim
14 words
A benzoin oxime of claim 1, wherein R 2 and R 3 are H.
Claim 6
Dependent Claim
6 words
A compound of claim 1, 2-hydroxy-1,2-diphenyl-5-thiobutylpentanone-oxime-1.
Claim 7
Dependent Claim
6 words
A compound of claim 1, 2-hydroxy-1,2-diphenyl-5-thiooctylpentanone-oxime-1.
Claim 8
Dependent Claim
6 words
A compound of claim 1, 2-hydroxy-1,2-di-p-tolyl-5-thiobutylpentanone-oxime-1.
Claim 9
Dependent Claim
12 words
A solution of a compound of claim 1 in a liquid hydrocarbon.
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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |