Patent US4436672A successfully refreshed from Google Patents.
US4436672A
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Oil recovery method utilizing glyceryl ether sulfonates
Assignee: Texaco Inc
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Filing: 1982-08-16
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Granted: 1984-03-13
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Expires: 2002-08-16
Abstract
Abstract Petroleum may be recovered from petroleum containing formations having high salinity and/or high temperature by injecting into the formation an aqueous fluid containing an effective amount of a surface active agent characterized by the formula: ##STR1## wherein R is an alkyl or alkylaryl radical, AO is an alkylene oxide radical, n is an integer of from 1 to 50, m is an integer from 1 to 10 and X is a sodium, potassium or ammonium cation.
Inventors
- 👤 Carter G. Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:34
CPC Classifications
C; C07; C07C; C07C309/00; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A composition of matter of the formula: ##STR7## wherein R is a linear or branched alkyl radical or mono- or polyalkyl substituted benzene radical containing from 8 to 24 carbon atoms; AO is an alkylene oxide radical of from 2 to 4 carbon atoms; n is an integer of from 1 to 50; m is an integer of from 1 to 10; and X is a sodium, potassium or ammonium cation.
Claim 2
Dependent Claim
71 words
A composition of matter of the formula: ##STR7## wherein R is a linear or branched alkyl radical or mono- or polyalkyl substituted benzene radical containing from 8 to 24 carbon atoms; AO is an alkylene oxide radical of from 2 to 4 carbon atoms; n is an integer of from 1 to 50; m is an integer of from 1 to 10; and X is a sodium, potassium or ammonium cation.
Claim 3
Dependent Claim
22 words
The composition of matter of claim 1 wherein R is a mono-alkyl substituted benzene radical containing from 9 to 20 carbon atoms.
Claim 4
Dependent Claim
17 words
The composition of matter of claim 1 wherein m is an integer of from 1 to 2.
Claim 5
Dependent Claim
13 words
The composition of matter of claim 1 wherein AO is an ethoxy radical.
Claim 6
Dependent Claim
16 words
The composition of matter of claim 1 wherein n is an integer of 2 to 10.
Claim 7
Dependent Claim
17 words
The composition of matter of claim 1 wherein n is an integer of from 3 to 5.
Claim 8
Dependent Claim
13 words
The composition of matter of claim 1 wherein X is a sodium cation.
References Cited (Backward Citations)
US4153575A
Cited
US4222957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |