NL222078A - - Google Patents

Info

Publication number
NL222078A
NL222078A NL222078A NL222078A NL222078A NL 222078 A NL222078 A NL 222078A NL 222078 A NL222078 A NL 222078A NL 222078 A NL222078 A NL 222078A NL 222078 A NL222078 A NL 222078A
Authority
NL
Netherlands
Application number
NL222078A
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of NL222078A publication Critical patent/NL222078A/xx

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70652—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/02—Oxides; Hydroxides
    • C01G49/06—Ferric oxide [Fe2O3]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70647—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides with a skin

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Dermatology (AREA)
  • General Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Iron (AREA)
  • Silicon Compounds (AREA)
NL222078A 1956-12-31 1957-11-01 NL222078A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED24600A DE1034163B (de) 1956-12-31 1956-12-31 Verfahren zur Herstellung von feinverteiltem, ferromagnetischem Eisenoxyd

Publications (1)

Publication Number Publication Date
NL222078A true NL222078A (xx) 1963-03-15

Family

ID=7038241

Family Applications (1)

Application Number Title Priority Date Filing Date
NL222078A NL222078A (xx) 1956-12-31 1957-11-01

Country Status (5)

Country Link
US (1) US2950955A (xx)
CH (1) CH372648A (xx)
DE (1) DE1034163B (xx)
GB (1) GB836275A (xx)
NL (1) NL222078A (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777031A (en) * 1986-07-14 1988-10-11 Cadot Corporation High temperature process for making fine magnetic particles
US4765920A (en) * 1986-07-14 1988-08-23 Cabot Corporation High temperature process for producing fine magnetic particles of M-phase structure
CA1327342C (en) * 1987-11-30 1994-03-01 James Kelly Kindig Process for beneficiating particulate solids
US5794791A (en) * 1987-11-30 1998-08-18 Genesis Research Corporation Coal cleaning process
WO1993007967A1 (en) * 1991-10-15 1993-04-29 Genesis Research Corporation Coal cleaning process

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1816388A (en) * 1924-05-23 1931-07-28 Ig Farbenindustrie Ag Method of producing finely divided metal oxides
US1850286A (en) * 1925-05-20 1932-03-22 Ig Farbenindustrie Ag Process for making finely divided metal oxides
US1992685A (en) * 1928-06-22 1935-02-26 Sulphur And Smelting Corp Production of ferric oxide by burning ferric chloride
GB677878A (en) * 1949-12-29 1952-08-20 Basf Ag Improvements in the production of magnetic iron oxides
BE511837A (xx) * 1951-06-04
GB726250A (en) * 1952-04-02 1955-03-16 Degussa Process for the production of finely divided oxides

Also Published As

Publication number Publication date
US2950955A (en) 1960-08-30
DE1034163C2 (xx) 1958-12-24
GB836275A (en) 1960-06-01
DE1034163B (de) 1958-07-17
CH372648A (de) 1963-10-31

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