US5585516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two tail-two head and two tail-one head surfactants
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1995-03-10
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Granted: 1996-12-17
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Expires: 2015-03-10
Abstract
Abstract The present invention relates to novel two tail-two head and two tail-one head surfactants. In one embodiment, the present invention comprises a novel composition of matter having the general formula: ##STR1## wherein R1 and R2 may be the same or different and are selected from liner or branched hydrocarbon chains with carbon numbers 8 and 22; R3 is H, SO - y M + , or --O (CH2CH2O) n X; R4 is SO - y M + , or --O (CH2CH2O) n X; M is H, Li, Na, K, Rb or Cs; n is an integer from 2 to 50; y is 3 or 4; and, X is H or SO - y M - . Preferably, in the above composition when R3 is other than H, R3═R4.
Inventors
- 👤 Ramesh Varadaraj
- 👤 Stephen Zushma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:33
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31; C07C305/00; C07C305/02; C07C305/04; C07C305/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
86 words
A compound having the general formula ##STR3## wherein R1 and R2 may be the same or different linear or branched hydrocarbon chains with carbon numbers 8 to 22; R3 is H, SO - y M + , or -O(CH2CH2O) n X; R4 is SO - y M + , or -O(CH2CH2O) n X; M is H, Li, Na, K, Rb or Cs; n is an integer from 2 to 50; y is 3 or 4; and, X is H or SO - y M + .
Claim 2
Dependent Claim
86 words
A compound having the general formula ##STR3## wherein R1 and R2 may be the same or different linear or branched hydrocarbon chains with carbon numbers 8 to 22; R3 is H, SO - y M + , or -O(CH2CH2O) n X; R4 is SO - y M + , or -O(CH2CH2O) n X; M is H, Li, Na, K, Rb or Cs; n is an integer from 2 to 50; y is 3 or 4; and, X is H or SO - y M + .
Claim 3
Dependent Claim
13 words
The compound of claim 1 wherein R3=R4 when R3 is other than H.
Claim 4
Dependent Claim
13 words
The compound of claim 2 wherein R3 and R4 are at para positions.
Claim 5
Dependent Claim
11 words
The compound of claim 3 wherein M is Na or K.
Claim 6
Dependent Claim
13 words
The compound of claim 1 wherein R 1 and R2 are the same.
Claim 7
Dependent Claim
14 words
The compound of claim 5 wherein R 3 is other than hydrogen and R4═R3.
Claim 8
Dependent Claim
15 words
The compound of claim 6 wherein R 3 and R 4 are at para positions.
Claim 9
Dependent Claim
14 words
The compound of claim 7 wherein R 3 is SO y M + .
Claim 10
Dependent Claim
12 words
The compound of claim 7 wherein R 3 is -O(CH2CH2O) n X.
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) | 1999-12-17 | 2000-06-17 | 2000-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-17 | 2004-06-17 | 2004-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-17 | 2008-06-17 | 2008-12-17 | $7700.00 | Window Closed / Lapsed |