EP 1047962 A1 20001102 - NEUTRAL-COLORED GRAY PHOTOCHROMIC PLASTIC OBJECT
Title (en)
NEUTRAL-COLORED GRAY PHOTOCHROMIC PLASTIC OBJECT
Title (de)
NEUTRALFARBENER GRAUER PHOTOCHROMER KUNSTSTOFFGEGENSTAND
Title (fr)
ARTICLE EN PLASTIQUE PHOTOCHROMIQUE GRIS NEUTRE
Publication
Application
Priority
- DE 19852680 A 19981116
- DE 19902878 A 19990125
- EP 9908791 W 19991116
Abstract (en)
[origin: WO0029877A1] The present invention relates to a neutral-colored gray photochromic plastic object that remains neutral-colored or gray during lightening or darkening of luminosity. The inventive plastic object can be used more particularly as a neutral-colored photochromic spectacle glass.
IPC 1-7
IPC 8 full level
C09K 9/02 (2006.01); G02B 1/04 (2006.01); G02B 5/23 (2006.01); G02C 7/02 (2006.01)
CPC (source: EP US)
C09K 9/02 (2013.01 - EP US); G02B 1/041 (2013.01 - EP US); G02B 5/23 (2013.01 - EP US)
Citation (search report)
See references of WO 0029877A1
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
WO 0029877 A1 20000525; AU 1651900 A 20000605; AU 750198 B2 20020711; CA 2318239 A1 20000525; CA 2318239 C 20060502; EP 1047962 A1 20001102; JP 2002530686 A 20020917; US 6373615 B1 20020416
DOCDB simple family (application)
EP 9908791 W 19991116; AU 1651900 A 19991116; CA 2318239 A 19991116; EP 99959280 A 19991116; JP 2000582826 A 19991116; US 60008100 A 20000711