(19)

(11)

EP 0 430 961 A1

(12)

(43) Date of publication: 12.06.1991 Bulletin 1991/24 (21) Application number: 89907801.0 (22) Date of filing: 30.06.1989

(51) International Patent Classification (IPC):  G01B 11/ 24( . ) G01N 9/ 00( . ) A61B 5/ 103( . ) (86) International application number: PCT/GB1989/000739 (87) International publication number: WO 1990/000032 (11.01.1990 Gazette 1990/02)

(84) Designated Contracting States: AT BE CH DE FR IT LI LU NL SE (30) Priority: 02.07.1988 GB 19880015797 25.05.1989 GB 19890012005 (71) Applicant: ULTRA-KLEAN LTD London SW17 (GB)	(72) Inventor: GRENFELL, Hugh, Willmott Swansea SA6 6HE (GB) (74) Representative: Gibson, Stewart Harry, et al  URQUHART-DYKES & LORD, Three Trinity Court, 21-27 Newport Road Cardiff CF2 1AA Cardiff CF2 1AA (GB)