(19)
(11) EP 0 988 150 A2

(12)

(88) Date of publication A3:
15.10.1998

(43) Date of publication:
29.03.2000 Bulletin 2000/13

(21) Application number: 97947408.7

(22) Date of filing: 05.11.1997
(51) International Patent Classification (IPC)7: B41M 3/14
(86) International application number:
PCT/US9720/342
(87) International publication number:
WO 9822/291 (28.05.1998 Gazette 1998/21)
(84) Designated Contracting States:
BE DE FR GB IT

(30) Priority: 05.11.1996 US 30366 P

(71) Applicant: EASTMAN CHEMICAL COMPANY
Kingsport, TN 37660 (US)

(72) Inventors:
  • CYR, Michael, John
    Kingsport, TN 37663-2712 (US)
  • KRUTAK, James, John, Sr.
    Kingsport, TN 37663-3613 (US)
  • CLAUBERG, Horst
    Kingsport, TN 37660-4786 (US)
  • HELTON, Tony, W.
    Kingsport, TN 37660-1120 (US)

(74) Representative: Evans, David Charles et al
fJ CLEVELAND 40-43, Chancery Lane
London, WC2A 1JQ
London, WC2A 1JQ (GB)


(56) References cited: : 
   
       


    (54) SECURITY DOCUMENT AND METHOD USING INVISIBLE CODED MARKINGS