Magnetooptical recording medium
CA 1310416 C · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Kajiura, Hirokazu; Haruta, Koichi; Igarashi, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A magnetooptical recording medium comprises a substrate, a magnetooptical recording film (I) and a reflection film (II), said films being laminated on said substrate in this order. The magnetooptical recording film (I) is a thin film of an amorphous alloy comprising (i) at least one 3d transition metal (ii) from, 5 to 30 atom % of at least one corrosion resistant metal and (iii) at least one rare earth element and having an, easy axis of magnetization perpendicular to the film plane, and the reflection film (ii) comprises a metal or alloy having a conductivity of not higher than 2 J/cm.sec.K. The recording medium described herein has excellent resistance to …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 17, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.