(19)
(11) EP 0 595 921 A1

(12)

(43) Date of publication:
11.05.1994 Bulletin 1994/19

(21) Application number: 92915826.0

(22) Date of filing: 15.07.1992
(51) International Patent Classification (IPC): 
C08F 8/ 00( . )
G02F 1/ 355( . )
G02F 1/ 35( . )
G02F 1/ 361( . )
(86) International application number:
PCT/US1992/005783
(87) International publication number:
WO 1993/002384 (04.02.1993 Gazette 1993/04)
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 19.07.1991 US 19910732562

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

(72) Inventors:
  • FOSS, Robert, Paul
    Hockessin, DE 19707 (US)
  • TAM, Wilson
    Boothwyn, PA 19061 (US)
  • ZUMSTEG, Fredrick, C., Jr.
    Wilmington, DE 19810 (US)

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

   


(54) PREPARATION OF NONLINEAR OPTICAL ELEMENTS