PROCESS FOR REDUCING DAMAGE SUSCEPTIBILITY IN OPTICAL-QUALITY CRYSTALS - Patent 0633953

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EP 0 633 953 A1

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(43)	Date of publication:
	18.01.1995 Bulletin 1995/03

(21)	Application number: 93908576.0

(22)	Date of filing: 25.03.1993

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International Patent Classification (IPC):

G02F 1/ 35^{( . )}
C30B 33/ 00^{( . )}

C30B 29/ 22^{( . )}
G02F 1/ 355^{( . )}

(86)	International application number:
	PCT/US1993/002796

(87)	International publication number:
	WO 1993/020266 (14.10.1993 Gazette 1993/25)

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

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Priority:

31.03.1992 US 19920860834

(71)	Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
	Wilmington Delaware 19898 (US)

(72)	Inventors:
	MORRIS, Patricia, A. Wilmington, DE 19803 (US) ROELOFS, Mark, G. Hockessin, DE 19707 (US)

(74)	Representative: Jones, Alan John
	CARPMAELS & RANSFORD 43 Bloomsbury Square London, WC1A 2RA London, WC1A 2RA (GB)

(54)	PROCESS FOR REDUCING DAMAGE SUSCEPTIBILITY IN OPTICAL-QUALITY CRYSTALS