(19)

(11)

EP 0 045 744 A1

(12)

(43) Date of publication: 17.02.1982 Bulletin 1982/07 (21) Application number: 80901958.0 (22) Date of filing: 27.10.1980

(51) International Patent Classification (IPC):  C04B 28/ 26( . ) (86) International application number: PCT/GB1980/000181 (87) International publication number: WO 1981/001283 (14.05.1981 Gazette 1981/12)

(84) Designated Contracting States: DE FR GB NL (30) Priority: 30.10.1979 GB 19790037599 (71) Applicant: CROSBY DOORS LIMITED Farnham Surrey, GU9 7EQ (GB)	(72) Inventor: DIXON, Maurice Farnham, Surrey (GB)