(19)

(11)

EP 0 452 419 A1

(12)

(43) Date of publication: 23.10.1991 Bulletin 1991/43 (21) Application number: 90902968.0 (22) Date of filing: 03.01.1990

(51) International Patent Classification (IPC):  C04B 38/ 06( . ) F21H 3/ 00( . ) F21H 1/ 02( . ) F21S 13/ 00( . ) (86) International application number: PCT/US1990/000056 (87) International publication number: WO 1990/007478 (12.07.1990 Gazette 1990/16)

(84) Designated Contracting States: CH DE FR GB IT LI NL SE (30) Priority: 03.01.1989 US 19890292767 (71) Applicant: EDGAR, John P Alameda, CA 94501 (US)	(72) Inventor: EDGAR, John P Alameda, CA 94501 (US) (74) Representative: Smulders, Theodorus A.H.J., Ir.  Vereenigde Octrooibureaux Nieuwe Parklaan 97 NL-2587 BN 's-Gravenhage NL-2587 BN 's-Gravenhage (NL)