EP 0219743 A1 19870429 - Security paper containing vesiculated beads.
Title (en)
Security paper containing vesiculated beads.
Title (de)
Bläschenartige Perlen enthaltendes Sicherheitspapier.
Title (fr)
Papier de sécurité contenant des perles vésiculaires.
Publication
Application
Priority
US 78462085 A 19851004
Abstract (en)
Security paper contains polymeric vesiculated beads having a volume average particle size of at least about 10 microns up to about 35 microns, these beads containing dye or pigment which glows when irradiated with nonvisible radiation, and being hard to see when the paper is viewed with the naked eye under normal visible light.
IPC 1-7
IPC 8 full level
B44F 1/12 (2006.01); D21H 21/48 (2006.01)
CPC (source: EP)
D21H 21/48 (2013.01)
Citation (search report)
- [Y] FR 2478695 A1 19810925 - AUSSEDAT REY [FR]
- [Y] GB 1528193 A 19781011 - HOECHST AG
- [YD] US 3933579 A 19760120 - KERSHAW ROBERT WILLIAM, et al
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 0219743 A1 19870429; CA 1282913 C 19910416; FI 864014 A0 19861003; FI 864014 A 19870405
DOCDB simple family (application)
EP 86113634 A 19861002; CA 519706 A 19861003; FI 864014 A 19861003