Stock material or miscellaneous articles – Magnetic recording component or stock – Binder media
Reexamination Certificate
2006-12-19
2008-10-07
Rickman, Holly (Department: 1794)
Stock material or miscellaneous articles
Magnetic recording component or stock
Binder media
Reexamination Certificate
active
07432000
ABSTRACT:
The present invention provides a magnetic recording medium which has a back coat layer excellent in surface smoothness and durability and is excellent in electromagnetic conversion property. A magnetic recording medium, comprising at least a non-magnetic support, a lower non-magnetic layer on one surface of the non-magnetic support, an upper magnetic layer on the lower non-magnetic layer, and a back coat layer on the other surface of the non-magnetic support, wherein the lower non-magnetic layer contains at least carbon black, a non-magnetic inorganic powder other than carbon black, and a binder resin material, the upper magnetic layer contains at least a ferromagnetic powder, and a binder resin material, and the back coat layer contains at least carbon black, a non-magnetic inorganic powder other than carbon black, a carboxylic acid amine salt, a phosphate amine salt, and a binder resin material.
REFERENCES:
patent: 4701375 (1987-10-01), Nishimatsu et al.
patent: 5368949 (1994-11-01), Ushimaru et al.
patent: 5543219 (1996-08-01), Elwakil
patent: 6653001 (2003-11-01), Murao et al.
patent: 7011900 (2006-03-01), Seki et al.
patent: 7157163 (2007-01-01), Yajima et al.
patent: 7208237 (2007-04-01), Seki et al.
patent: 2002/0155324 (2002-10-01), Murao et al.
patent: 2004/0197605 (2004-10-01), Seki et al.
patent: 2004/0207955 (2004-10-01), Seki et al.
patent: 2004/0209121 (2004-10-01), Yajima et al.
patent: 2007/0026264 (2007-02-01), Kuwajima et al.
patent: 2007/0141402 (2007-06-01), Kuwajima et al.
patent: 2001-344737 (2001-12-01), None
patent: 2002-312922 (2002-10-01), None
patent: 2002312922 (2002-10-01), None
Disparlon For Water born coatings, Kusumoto Cheicals, Ltd., date unknown.
Disparlon For Pigments/Dispersants, Kusumoto Cheicals, Ltd., date unknown.
Disparlon DA-325, Kusumoto Cheicals, Ltd., date unknown.
U.S. Appl. No. 11/958,036, filed Dec. 17, 2007, Kuwajima, et al.
Kuwajima Takayoshi
Yamazaki Katsuhiko
Harris Gary
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Rickman Holly
TDK Corporation
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