SURFACTANT SELECTION METHOD FOR THE EXTRACTION OF CHEMICAL POLLUTANTS FROM SOILS - Patent 0552327

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(11)

EP 0 552 327 A1

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(43)	Date of publication:
	28.07.1993 Bulletin 1993/30

(21)	Application number: 92914074.0

(22)	Date of filing: 22.06.1992

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International Patent Classification (IPC):

B01D 11/ 02^{( . )}
B09C 1/ 08^{( . )}
G01N 33/ 24^{( . )}

B09C 1/ 02^{( . )}
G01N 13/ 02^{( . )}

(86)	International application number:
	PCT/US1992/005176

(87)	International publication number:
	WO 1993/004356 (04.03.1993 Gazette 1993/06)

(84)	Designated Contracting States:
	DE FR GB

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Priority:

13.08.1991 US 19910747239

(71)	Applicant: Hughes Aircraft Company
	Los Angeles, California 90045-0066 (US)

(72)	Inventors:
	PURCELL, Lauren, M. Signal Hill, CA 90806 (US) LAWRENCE, Albert, F. San Diego, CA 92130 (US)

(74)	Representative: Colgan, Stephen James, et al
	CARPMAELS & RANSFORD 43 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)

(54)	SURFACTANT SELECTION METHOD FOR THE EXTRACTION OF CHEMICAL POLLUTANTS FROM SOILS