Patent US4056564A successfully refreshed from Google Patents.
US4056564A
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Dihydroxy sulphonates containing ether structures
Assignee: Bayer AG
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Filing: 1975-07-22
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Granted: 1977-11-01
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Expires: 1995-07-22
Abstract
Abstract The instant invention relates to dihydroxy sulphonates containing ether groups, and to a process for their production. They are obtained by the addition of bisulphites to (poly)alkoxylated dihydroxy alkenes.
Inventors
- 👤 Gerhard Dieter Wolf
- 👤 Francis Bentz
- 👤 Gunther Nischk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:09
CPC Classifications
C; C07; C07C; C07C309/00; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0828; C08G63/00; C08G63/68; C08G63/688; C08G69/00; C08G69/42
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
64 words
Dihydroxy sulphonates containing ether groups and corresponding to the following general formula: ##STR12## wherein A represents a straight- or branched-chain alkylene radical having from 1 to 6 carbon atoms; R represents hydrogen, a C 1 -C 4 alkyl radical or phenyl; Me represents NH 4 or an alkali metal; m is 0 or 1; and n is a number of from 1 to 30.
Claim 2
Dependent Claim
64 words
Dihydroxy sulphonates containing ether groups and corresponding to the following general formula: ##STR12## wherein A represents a straight- or branched-chain alkylene radical having from 1 to 6 carbon atoms; R represents hydrogen, a C 1 -C 4 alkyl radical or phenyl; Me represents NH 4 or an alkali metal; m is 0 or 1; and n is a number of from 1 to 30.
Claim 3
Dependent Claim
18 words
Dihydroxy sulphonates containing ether groups as claimed in claim 1, wherein m in general formula (I) is 0.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |