Process for production of ferromagnetic powder
Patent 4063000 Issued on December 13, 1977. Estimated Expiration Date: 
December 13, 1994. 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.
December 13, 1994. 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 References 3139354 3567525 3663318 3756866 InventorsAssigneeApplicationNo. 05/614274 filed on 09/17/1975US Classes:428/403, Coated148/105, Particulate material252/62.55, Free metal or alloy containing427/127, MAGNETIC BASE OR COATING427/216, Metal base428/900, MAGNETIC FEATURE75/349Using Phosphorus(P), Boron(B), or Silicon(Si) or compound thereofExaminersPrimary: Kendall, Ralph S.Attorney, Agent or FirmForeign Application Priority Data1974-09-17 JAAbstractA process for producing a ferromagnetic metal powder comprising treating a ferromagnetic metal powder produced by a solution reduction process with an aqueous solution containing at least one anionic surface active agent.Field of SearchMAGNETIC FEATURE | |
