(19)

(11)

EP 0 038 325 A1

(12)

(43) Date of publication: 28.10.1981 Bulletin 1981/43 (21) Application number: 80900282.0 (22) Date of filing: 24.10.1979

(51) International Patent Classification (IPC):  B01D 45/ 12( . ) B01D 45/ 16( . ) B01D 45/ 08( . ) B04C 3/ 00( . ) (86) International application number: PCT/US1979/000890 (87) International publication number: WO 1981/001110 (30.04.1981 Gazette 1981/11)

(84) Designated Contracting States: FR (71) Applicant: MALONEY-CRAWFORD CORPORATION Tulsa, OK 74101 (US)	(72) Inventor: HODGSON, Robert A. Tulsa, OK 74105 (US) (74) Representative: Simonnot, Bernard, et al  Cabinet Simonnot 35 rue de Clichy F-75442 Paris Cédex 09 F-75442 Paris Cédex 09 (FR)