US4167639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated sulfosuccinates
Assignee: Hoechst AG
•
Filing: 1978-02-17
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Granted: 1979-09-11
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Expires: 1998-02-17
Abstract
Abstract Addition products of water-soluble sulfites or disulfites to maleic acid mono- or diesters of partially fluorinated alkanols or the mono-, di- or triethyleneglycol ethers of these alcohols are useful as surface active agents, especially as wetting agents, as levelling agents in wax emulsions or as dispersants.
Inventors
- 👤 Seigfried Billenstein
- 👤 Heinz Brecht
- 👤 Dieter Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:50
CPC Classifications
C; C07; C07C; C07C309/00; A; A01; A01N; A01N25/00; A01N25/30; C09; C09D; C09D7/00; C09D7/40; C09D7/47; C09K; C09K23/00; C09K23/04; C11; C11D; C11D1/00; C11D1/004; D; D06; D06P; D06P1/00; D06P1/44; D06P1/60; D06P1/613; D06P1/62; D06P1/621; D06P1/622; D06P1/626; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A compound of the formula R--O--CO--CH.sub.2 --CH(SO.sub.3 M)--CO--O--R.sup.1 in which R is a group of the formula R.sub.f --(CH.sub.2).sub.m --(OCH.sub.2 CH.sub.2).sub.n -- wherein R f is straight-chain or terminally methyl-branched perfluoroalkyl of 2 to 8 carbon atoms, m is a number of 1 to 4, n is a number of zero to 3, M is hydrogen, an alkali metal, ammonium, monoethanolammonium, diethanolammonium, triethanolammonium, glycinium, taurinium, and N-methyltaurinium, and R 1 is defined as R or as M.
Claim 2
Dependent Claim
77 words
A compound of the formula R--O--CO--CH.sub.2 --CH(SO.sub.3 M)--CO--O--R.sup.1 in which R is a group of the formula R.sub.f --(CH.sub.2).sub.m --(OCH.sub.2 CH.sub.2).sub.n -- wherein R f is straight-chain or terminally methyl-branched perfluoroalkyl of 2 to 8 carbon atoms, m is a number of 1 to 4, n is a number of zero to 3, M is hydrogen, an alkali metal, ammonium, monoethanolammonium, diethanolammonium, triethanolammonium, glycinium, taurinium, and N-methyltaurinium, and R 1 is defined as R or as M.
Claim 3
Dependent Claim
12 words
A compound as defined in claim 1, wherein R f is n-perfluoroalkyl.
Claim 4
Dependent Claim
18 words
A compound as defined in claim 1, wherein R f is n-perfluoroalkyl of 4 to 6 carbon atoms.
Claim 5
Dependent Claim
14 words
A compound as defined in claim 1, wherein m is 1, 2 or 4.
Claim 6
Dependent Claim
11 words
A compound as defined in claim 1, wherein m is 2.
Claim 7
Dependent Claim
13 words
A compound as defined in claim 1, wherein M is sodium or potassium.
Claim 8
Dependent Claim
31 words
The compound as defined in claim 1, wherein R f is n-C 6 F 13 , n is 2, m is 2, M is sodium and R 1 is as R.
Claim 9
Dependent Claim
31 words
The compound as defined in claim 1, wherein R f is n-C 6 F 13 , m is 2, n is zero, M is sodium and R 1 is as R.
Claim 10
Dependent Claim
29 words
The compound as defined in claim 1, wherein R f is n-C 6 F 13 , m is 2, n is zero and M and R 1 are sodium.
Claim 11
Dependent Claim
29 words
The compound as defined in claim 1, wherein R f is n-C 6 F 13 , m is 2, n is 2 and M and R 1 are sodium.
References Cited (Backward Citations)
US3137713A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |