EP 0479438 B1 19970402 - Electromagnetic radiation absorbing material employing doubly layered particles
Title (en)
Electromagnetic radiation absorbing material employing doubly layered particles
Title (de)
Elektromagnetische Strahlung absorbierendes Material mit doppelt umhüllten Partikeln
Title (fr)
Matériau absorbant les ondes électromagnétiques à particules à double enrobage
Publication
Application
Priority
US 59179990 A 19901002
Abstract (en)
[origin: EP0479438A2] An electromagnetic radiation absorbing material (12) comprises doubly layered core particles (11) dispersed in a dielectric binder material (14). The first layer (15) dissipates radiation; the second layer (17) is an insulating material which helps prevent the particles (11) from conductively contacting each other, and prevents degradation of the first layer (15). The absorber may be applied to an electrically conductive material (18), and an impedance matching material (16) may be used. <IMAGE>
IPC 1-7
IPC 8 full level
H05K 9/00 (2006.01); H01Q 17/00 (2006.01)
CPC (source: EP KR)
H01Q 17/002 (2013.01 - EP); H01Q 19/00 (2013.01 - KR)
Citation (examination)
- EP 0240809 A2 19871014 - BASF AG [DE]
- EP 0374795 A1 19900627 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- GB 893007 A 19620404 - PLESSEY CO LTD
- GB 1216071 A 19701216 - WESCH LUDWIG [DE]
- US 2951247 A 19600830 - OTTO HALPERN, et al
- US 3599210 A 19710810 - STANDER MAXWELL
- US 4012738 A 19770315 - WRIGHT RUFUS W
- PATENT ABSTRACTS OF JAPAN, vol. 1, no. 30 (E-76)[1064], 29th March 1977; & JP-A-51 122 356 (MITSUBISHI DENKI K.K.) 26-10-1976
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0479438 A2 19920408; EP 0479438 A3 19921014; EP 0479438 B1 19970402; DE 69125444 D1 19970507; DE 69125444 T2 19971023; JP 3009763 B2 20000214; JP H06342993 A 19941213; KR 920007792 A 19920527
DOCDB simple family (application)
EP 91308300 A 19910911; DE 69125444 T 19910911; JP 24322891 A 19910924; KR 910017054 A 19910930