(19)

(11)

EP 0 197 921 A1

(12)

(43) Date of publication: 22.10.1986 Bulletin 1986/43 (21) Application number: 84903739.0 (22) Date of filing: 02.10.1984

(51) International Patent Classification (IPC):  B01L 3/ 02( . ) (86) International application number: PCT/US1984/001571 (87) International publication number: WO 1986/002161 (10.04.1986 Gazette 1986/08)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (71) Applicants: DEVAUGHN, Donald H. San Francisco, CA 94131 (US) MAKER, Edward H. II Walnut Creek, CA 94598 (US)	(72) Inventors: WATTS, Philip, S. Pingree, ID 83262 (US) RATY, Dallas, L. Provo, UT 84601 (US)