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Class Information
Number: 428/840.2
Name: Stock material or miscellaneous articles > Magnetic recording component or stock > Binder media > Single magnetic layer with underlayer > Underlayer composition or structure > Nonmagnetic particles in underlayer (e.g., a12o3 particles, etc.)
Description: Subject matter in which the medium underlayer contains nonmagnetic particles.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7494728 |
Magnetic tape and magnetic tape cartridge |
Feb. 24, 2009 |
| 7378679 |
Patterned substrate, electro-optical device, and method for manufacturing an electro-optical device |
May. 27, 2008 |
| 7357997 |
Powder for underlayer of coating-type magnetic recording medium and magnetic recording medium comprising the same |
Apr. 15, 2008 |
| 7348079 |
Magnetic recording medium |
Mar. 25, 2008 |
| 7238438 |
Powder for underlayer of coating-type magnetic recording medium |
Jul. 3, 2007 |
| 7166377 |
Magnetic recording medium |
Jan. 23, 2007 |
| 7090936 |
Magnetic recording medium |
Aug. 15, 2006 |
| 7056607 |
Magnetic recording medium |
Jun. 6, 2006 |
| 6939606 |
Magnetic recording medium |
Sep. 6, 2005 |
| 6805950 |
Magnetic recording medium having a low molecular weight azo dye including an aryl group |
Oct. 19, 2004 |
| 6803104 |
Magnetic recording medium, non-magnetic acicular black iron-based composite particles and process for producing the particles |
Oct. 12, 2004 |
| 6777061 |
Magnetic recording medium and process for producing the same |
Aug. 17, 2004 |
| 6749917 |
Magnetic recording medium |
Jun. 15, 2004 |
| 6744585 |
Magnetic recording medium and method for reproducing magnetic recording |
Jun. 1, 2004 |
| 6723456 |
Hematite particles aggregates, non-magnetic undercoatt layer for magnetic recording medium using the same, and magnetic recording medium having the non-magnetic undercoat layer |
Apr. 20, 2004 |
| 6670030 |
Biaxially oriented laminate polyester film for magnetic recording medium |
Dec. 30, 2003 |
| 6667120 |
Magnetic recording medium, non-magnetic acicular composite particles and process for producing the particles |
Dec. 23, 2003 |
| 6506470 |
Magnetic recording medium |
Jan. 14, 2003 |
| 6440552 |
Boehmite and base coat layer for magnetic recording medium |
Aug. 27, 2002 |
| 6440545 |
Powder for use in lower layer of coating type magnetic recording medium |
Aug. 27, 2002 |
| 6403241 |
CoCrPtB medium with a 1010 crystallographic orientation |
Jun. 11, 2002 |
| 6287668 |
Magnetic recording medium and substrate therefor |
Sep. 11, 2001 |
| 6284361 |
Magnetic recording medium and process for producing the same |
Sep. 4, 2001 |
| 6248437 |
Magnetic recording medium containing non-magnetic hematite particles as an undercoat layer |
Jun. 19, 2001 |
| 6207279 |
High-density acicular hematite particles, non-magnetic undercoat layer and magnetic recording medium |
Mar. 27, 2001 |
| 6207253 |
Acicular hematite particles and magnetic recording medium |
Mar. 27, 2001 |
| 6171692 |
Particle for lower layer of coating type magnetic recording medium |
Jan. 9, 2001 |
| 6159592 |
Magnetic recording medium |
Dec. 12, 2000 |
| 6153296 |
Acicular hematite particles and magnetic recording medium |
Nov. 28, 2000 |
| 6143403 |
Magnetic recording medium |
Nov. 7, 2000 |
| 6136410 |
Magnetic recording medium |
Oct. 24, 2000 |
| 6124022 |
Acicular hematite particles for non-magnetic undercoat layer of magnetic recording medium, and magnetic recording medium using the same |
Sep. 26, 2000 |
| 6071605 |
Magnetic recording medium and production method thereof |
Jun. 6, 2000 |
| 6063490 |
Magnetic recording medium comprising non-magnetic acicular particles containing mainly iron and having titanium dispersed therein |
May. 16, 2000 |
| 6054201 |
Magnetic recording medium |
Apr. 25, 2000 |
| 6042937 |
Titanium oxide particles, substrate for magnetic recording medium and magnetic recording medium using the same |
Mar. 28, 2000 |
| 6040043 |
Particles for lower layer of coating type magnetic recording medium |
Mar. 21, 2000 |
| 6030688 |
Rectangular parallelopipedic lepidocrocite particles and magnetic recording medium containing the particles |
Feb. 29, 2000 |
| 6020022 |
Magnetic recording medium |
Feb. 1, 2000 |
| 6015602 |
Magnetic recording medium |
Jan. 18, 2000 |
| 5985408 |
Magnetic recording medium |
Nov. 16, 1999 |
| 5908683 |
Magnetic recording medium |
Jun. 1, 1999 |
| RE36220 |
Magnetic recording medium having a magnetic layer with specified limits of both RA and R10Z surface roughness |
Jun. 1, 1999 |
| 5906885 |
Magnetic recording medium |
May. 25, 1999 |
| 5902676 |
Coating type magnetic recording medium having a multilayer structure |
May. 11, 1999 |
| 5895707 |
Magnetic recording medium |
Apr. 20, 1999 |
| 5587232 |
Non-magnetic particles for non-magnetic undercoating layer of magnetic recording medium, non-magnetic undercoating layer containing the same, and magnetic recording medium having the undercoat |
Dec. 24, 1996 |
| 5389418 |
Flexible magnetic recording disk and method for preparing the same |
Feb. 14, 1995 |
| 4615930 |
Magnetic recording media having an undercoat as islands |
Oct. 7, 1986 |
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