(19)

(11)

EP 0 024 388 A1

(12)

(43) Date of publication: 11.03.1981 Bulletin 1981/10 (21) Application number: 79901235.0 (22) Date of filing: 02.03.1979

(51) International Patent Classification (IPC):  F16L 37/ 12( . ) (86) International application number: PCT/US1979/000118 (87) International publication number: WO 1980/001833 (04.09.1980 Gazette 1980/20)

(84) Designated Contracting States: CH DE FR GB LU NL SE (71) Applicant: AMERON, INC. Monterey Park California 91754 (US)	(72) Inventor: Wilms, Carl A. La Habra, CA 90631 (US)