Global Patent Index - EP 0994775 A1

EP 0994775 A1 2000-04-26 - COLORING MEDIA HAVING IMPROVED BRIGHTNESS AND COLOR CHARACTERISTICS

Title (en)

COLORING MEDIA HAVING IMPROVED BRIGHTNESS AND COLOR CHARACTERISTICS

Title (de)

FARBMEDIEN MIT VERBESSERTE FARB- UND HELLIGKEITS EIGENSCHAFTEN

Title (fr)

MILIEUX DE COLORATION PRESENTANT DES PROPRIETES D'ECLAT ET DE COLORATION AMELIOREES

Publication

EP 0994775 A1 (EN)

Application

EP 98934370 A

Priority

  • US 9814264 W
  • US 89032097 A
  • US 89187797 A
  • US 89865897 A

Abstract (en)

[origin: WO9902340A1] Disclosed are novel reflective microflakes for use in making "additive-primary" coloring media having improved reflection characteristics over the red, green and blue super bright color characteristics, and "super-white" coloring media having Magnesium Oxide like color characteristics. The coloring media of the present invention provides a palette of colors for imparting color characteristics or forming color images upon surfaces of arbitrary surface geometry. In one embodiment, the microflakes are made from cholesteric liquid crystal (CLC) material, wherein the pitch of the helices of the liquid crystal molecules in each CLC microflake varies along the thickness dimension thereof. Depending on the final spiral structure of the materials utilized, the CLC circularly polarizing materials reflect either left-handed or right-handed circularly polarized light. Further, each CLC microflake of additive coloring media has a laminated construction on order that both the upper and lower surfaces thereof have substantially the same reflection characteristics over its tuned reflection band.

IPC 1-7 (main, further and additional classification)

B32B 27/04; B32B 33/00; C09D 11/12; C09D 13/00; C09K 19/00; C09K 19/52; G02B 27/22; G02F 1/00; G03G 13/00

IPC 8 full level (invention and additional information)

B41J 2/01 (2006.01); C09D 5/36 (2006.01); C09D 7/12 (2006.01); C09D 11/12 (2006.01); C09D 13/00 (2006.01); C09D 17/00 (2006.01); C09D 201/00 (2006.01); C09K 19/00 (2006.01); G02B 5/20 (2006.01); G02B 5/30 (2006.01); G02B 27/22 (2006.01); G02F 1/00 (2006.01); G03G 9/09 (2006.01)

CPC (invention and additional information)

B82Y 15/00 (2013.01); C09D 5/36 (2013.01); C09D 13/00 (2013.01); C09K 19/00 (2013.01); G02B 5/3016 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9902340 A1 19990121; AU 8390898 A 19990208; EP 0994775 A1 20000426; EP 0994775 A4 20030402; JP 2001509520 A 20010724; KR 20010021704 A 20010315

INPADOC legal status


2007-02-16 [REG HK WD] APPLICATIONS WITHDRAWN, DEEMED TO BE WITHDRAWN, OR REFUSED AFTER PUBLICATION IN HONG KONG

- Document: HK 1028217

2003-05-28 [18W] WITHDRAWN

- Effective date: 20030403

2003-04-02 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20030218

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 32B 27/04 A

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7B 32B 33/00 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 09D 11/12 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 09D 13/00 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 09K 19/00 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 09K 19/52 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 02F 1/00 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 02B 27/22 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 03G 13/00 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7G 02B 5/30 B

2003-04-02 [RIC1] CLASSIFICATION (CORRECTION)

- IPC: 7C 09D 5/36 B

2000-04-26 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000209

2000-04-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE