OPTICALLY NON-LINEAR MATERIALS - Patent 0642678

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EP 0 642 678 A1

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(43)	Date of publication:
	15.03.1995 Bulletin 1995/11

(21)	Application number: 93910286.0

(22)	Date of filing: 26.05.1993

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International Patent Classification (IPC):

G02F 1/ 35^{( . )}
C09B 23/ 14^{( . )}
G02F 1/ 361^{( . )}

C09B 23/ 00^{( . )}
G02F 1/ 355^{( . )}

(86)	International application number:
	PCT/GB1993/001083

(87)	International publication number:
	WO 1993/024859 (09.12.1993 Gazette 1993/29)

(84)	Designated Contracting States:
	DE FR GB IT NL

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Priority:

27.05.1992 GB 19920011238

(71)	Applicant: BRITISH TECHNOLOGY GROUP LIMITED
	London SE1 6BU (GB)

(72)	Inventor:
	ASHWELL, Geoffrey Joseph Shelfleys, Northampton NN4 9XE (GB)

(74)	Representative: Neville, Peter Warwick
	Patents Department British Technology Group Ltd 101 Newington Causeway London SE1 6BU London SE1 6BU (GB)

(54)	OPTICALLY NON-LINEAR MATERIALS