Recording media comprising vertical magnetization layers essentially consisting of quaternary Co--Ni--Zn--P alloys
Patent 4517257 Issued on May 14, 1985. Estimated Expiration Date: 
September 13, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 13, 2003. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRecording member comprising a substrate with a magnetic lager on one surface and a lubricating lager on the opposed surface Recording method employing a magnetic recording medium Magnetic audio-recording tape Patent #: 4309471 InventorsApplicationNo. 06/531681 filed on 09/13/1983US Classes:428/836.3, Magnetic layer having inorganic compound of Si, N, P, B, H, or C360/134, Tape360/135, Disk360/136, Drum427/131, Applying superposed diverse coating or coating a coated base427/132, Metal coating428/900MAGNETIC FEATUREExaminersPrimary: Robinson, Ellis P.Attorney, Agent or FirmInternational ClassesG11B 5/66 (20060101)G11B 5/64 (20060101) Foreign Application Priority Data1982-09-14 JPAbstractMagnetic recording media suitable for use in vertical magnetization recording systems are described. The media comprise a magnetic layer on at least one side of a substrate. The magnetic layer is made of a specific type of quaternary alloy. The alloy essentially consists of from 3 to 42 wt % of Co, from 54 to 89 wt % of Ni, from 4 to 8 wt % of P, and from 0.1 to 3.2 wt % of Zn provided that (7.2 XP +12.8) wt %ࣘXNi ࣘ(7.2 XP +43.2) wt % in which XP represents a content of P and XNi represents a content of Ni, both expressed by wt %.Field of SearchMAGNETIC FEATURE | |
