METHOD OF CLEANING AND MAINTAINING POTABLE WATER DISTRIBUTION PIPE SYSTEMS

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EP 0 690 944 A1

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(43)	Date of publication:
	10.01.1996 Bulletin 1996/02

(21)	Application number: 94912283.0

(22)	Date of filing: 22.03.1994

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International Patent Classification (IPC):

B08B 9/ 02^{( . )}
B08B 9/ 032^{( . )}
C11D 7/ 26^{( . )}
C11D 11/ 00^{( . )}
C23G 1/ 08^{( . )}

B08B 9/ 027^{( . )}
C11D 7/ 08^{( . )}
C11D 7/ 32^{( . )}
C23G 1/ 02^{( . )}
E03B 7/ 09^{( . )}

(86)	International application number:
	PCT/US1994/003065

(87)	International publication number:
	WO 1994/021865 (29.09.1994 Gazette 1994/22)

(84)	Designated Contracting States:
	AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

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Priority:

23.03.1993 US 19930036188
17.03.1994 US 19940209953

(71)	Applicant: H.E.R.C. INCORPORATED
	Phoenix, AZ 85017-4496 (US)

(72)	Inventors:
	HIEATT, Allen, C. Mesa, AZ 85210 (US) LUDWIG, Jerome, H. Paradise Valley, AZ 85210 (US)

(74)	Representative: Findlay, Alice Rosemary
	Lloyd Wise, Tregear & Co. Norman House 105-109 Strand London WC2R 0AE London WC2R 0AE (GB)

(54)	METHOD OF CLEANING AND MAINTAINING POTABLE WATER DISTRIBUTION PIPE SYSTEMS