US4134854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonionic surfactant with low pour point
Assignee: Texaco Development Corp
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Filing: 1975-07-07
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Granted: 1979-01-16
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Expires: 1995-07-07
Abstract
Abstract Nonionic surface-active agents prepared by the addition of ethylene oxide to mixtures of alcohols containing from 8 to 20 carbon atoms are often solids or mixtures of solids and liquids at room temperatures. The pour points of such nonionic surfactants can be lowered without appreciably adversely affecting other properties by the sequential addition of ethylene oxide, propylene oxide and ethylene oxide to the alcohol if the initial oxyethylene block contains from 30% to 60% of the total oxyethylene groups in the molecule.
Inventors
- 👤 John G. Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:34
CPC Classifications
C; C07; C07C; C07C43/00; C07C43/02; C07C43/03; C07C43/04; C07C43/10; C07C43/11; C07C41/00; C07C41/01; C07C41/02; C07C41/03; C09; C09K; C09K23/00; C09K23/42; Y; Y10; Y10S; Y10S516/00; Y10S516/905; Y10S516/917; Y10S516/92
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
A surfactant which is a mixture of compounds having the formula ##STR2## wherein R is a straight or branched alkyl group from 8 to 20 carbon atoms, n and m are from 2 to 10 and are chosen such that n/n+m is within the range of 0.2 to 0.6 and p is 0.5 to 3 such that p/n+m is within the range of about 0.119 to 0.25.
Claim 2
Dependent Claim
67 words
A surfactant which is a mixture of compounds having the formula ##STR2## wherein R is a straight or branched alkyl group from 8 to 20 carbon atoms, n and m are from 2 to 10 and are chosen such that n/n+m is within the range of 0.2 to 0.6 and p is 0.5 to 3 such that p/n+m is within the range of about 0.119 to 0.25.
Claim 3
Dependent Claim
16 words
A surfactant as in claim 1 wherein n/n+m is within the range of 0.3 to 0.5
References Cited (Backward Citations)
US3030426A
Cited
GB950844A
Cited
US3324035A
Cited
US3340309A
Cited
US3567784A
Cited
US3752857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |