US3925438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated urethane-N-sulfonic acid esters
Assignee: Hoechst AG
•
Filing: 1974-07-02
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Granted: 1975-12-09
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Expires: 1994-07-02
Abstract
Abstract Polyglycol esters of fluoroalkylurethane-N-sulfonic acids are obtained by reacting fluoroalkanols or oxethylates thereof with chlorosulfonyl isocyanate and acylating with the so-obtained sulfochloride a polyglycol. The products are thermo-labile emulsifiers.
Inventors
- 👤 Heinz Brecht
- 👤 Dieter Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:58
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/425; C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/329; C08G65/334; C08G65/3348; D06M15/00; D06M15/19; D06M15/37; D06M15/53; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
15 words
A compound as defined in claim 1, wherein Rf has 6 or 7 carbon atoms.
Claim 4
Dependent Claim
18 words
A compound as defined in claim 1, wherein p is a number of about 10 to about 20.
Claim 5
Dependent Claim
33 words
A compound as defined in claim 1, wherein Rf is n-C6F13, n is 2, m is a number of 1 to 3 and p is a number of about 4 to about 25.
Claim 6
Dependent Claim
16 words
The compound as defined in claim 4, wherein m is 3 and p is about 4.5.
Claim 7
Dependent Claim
16 words
The compound as defined in claim 4, wherein m is 3 and p is about 23.
Claim 8
Dependent Claim
16 words
The compound as defined in claim 4, wherein m is 1 and p is about 45.
Claim 9
Dependent Claim
16 words
The compound as defined in claim 4, wherein m is 1 and p is about 23.
Claim 10
Dependent Claim
16 words
The compouNd as defined in claim 4, wherein m is 1 and p is about 4.5.
References Cited (Backward Citations)
US3839417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |