US4623468A
Expired / Lapsed
US
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Method for treating oil slicks
Assignee: Labofina SA
•
Filing: 1985-03-18
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Granted: 1986-11-18
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Expires: 2005-03-18
Abstract
Abstract A method for reducing oil slick on seawater comprising applying to the oil slick a dispersing compositions containing at least one surface-active agent, at least one solvent, and a nitrogen-containing compound which is a nutrient for the micro-organisms which are active in oil metabolism. The nitrogen-containing compound is a monoalkylguanidinium salt ##STR1## wherein R is an aliphatic hydrocarbon radical, saturated or unsaturated, containing from about 8 to about 20 carbon atoms, and X is a halogen or an acid anion.
Inventors
- 👤 Andre Lepain
- 👤 Robert D. E. M. Bronchart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:07
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/34; C02F3/344; C02F1/00; C02F1/68; C02F1/682; C09; C09K; C09K3/00; C09K3/32; Y; Y10; Y10S; Y10S210/00; Y10S210/918; Y10S210/922; Y10S210/925; Y10S516/00; Y10S516/01; Y10S516/03; Y10S516/05; Y10S516/06; Y10S516/07; Y10S516/905; Y10S516/914
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
59 words
A method for reducing an oil slick on sea water, comprising applying to the oil slick a dispersing composition comprising a surface-active agent, a solvent, and a monoalkylguanidium salt having the general formula: ##STR6## where R is an aliphatic hydrocarbon radical containing from about 8 to about 20 carbon atoms, and X is a halogen or an acid anion.
Claim 2
Independent Claim
59 words
A method for reducing an oil slick on sea water, comprising applying to the oil slick a dispersing composition comprising a surface-active agent, a solvent, and a monoalkylguanidium salt having the general formula: ##STR6## where R is an aliphatic hydrocarbon radical containing from about 8 to about 20 carbon atoms, and X is a halogen or an acid anion.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said composition solvent comprises a liquid hydrocarbon containing less than 5 percent aromatic compounds, plus less than 50 percent water.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-17 | 1990-05-19 | 1990-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-17 | 1994-05-19 | 1994-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-17 | 1998-05-19 | 1998-11-18 | $7700.00 | Window Closed / Lapsed |