FR2199155B1 - - Google Patents

Info

Publication number
FR2199155B1
FR2199155B1 FR7232367A FR7232367A FR2199155B1 FR 2199155 B1 FR2199155 B1 FR 2199155B1 FR 7232367 A FR7232367 A FR 7232367A FR 7232367 A FR7232367 A FR 7232367A FR 2199155 B1 FR2199155 B1 FR 2199155B1
Authority
FR
France
Legal status (The legal status 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 status listed.)
Expired
Application number
FR7232367A
Other languages
French (fr)
Other versions
FR2199155A1 (xx
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kodak Pathe SA
Original Assignee
Kodak Pathe SA
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 by Kodak Pathe SA filed Critical Kodak Pathe SA
Priority to FR7232367A priority Critical patent/FR2199155B1/fr
Priority to DE19732343562 priority patent/DE2343562C3/de
Priority to US395220A priority patent/US3928709A/en
Priority to DD17343973A priority patent/DD105920A5/xx
Priority to IT2874973A priority patent/IT995315B/it
Priority to CA180,733A priority patent/CA1006335A/en
Priority to CH1309873A priority patent/CH581075A5/xx
Priority to JP48102269A priority patent/JPS5814047B2/ja
Priority to GB4289873A priority patent/GB1436140A/en
Priority to BE135629A priority patent/BE804829A/xx
Priority to NL7312614A priority patent/NL7312614A/xx
Publication of FR2199155A1 publication Critical patent/FR2199155A1/fr
Application granted granted Critical
Publication of FR2199155B1 publication Critical patent/FR2199155B1/fr
Expired legal-status Critical Current

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
    • G11B5/70678—Ferrites
    • 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • 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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70689—Magnetite
FR7232367A 1972-03-01 1972-09-13 Expired FR2199155B1 (xx)

Priority Applications (11)

Application Number Priority Date Filing Date Title
FR7232367A FR2199155B1 (xx) 1972-09-13 1972-09-13
DE19732343562 DE2343562C3 (de) 1972-09-13 1973-08-29 Dotierte Ferro-Ferrioxid Teilchen
US395220A US3928709A (en) 1972-03-01 1973-09-07 Ferrous ferric oxides, process for preparing same and their use in magnetic recording
DD17343973A DD105920A5 (xx) 1972-09-13 1973-09-10
IT2874973A IT995315B (it) 1972-09-13 1973-09-10 Materiale per la registrazione magnetica ad alta risoluzione
CA180,733A CA1006335A (en) 1972-09-13 1973-09-11 Ferrous ferric oxides, process for preparing same and their use in magnetic recording
CH1309873A CH581075A5 (xx) 1972-09-13 1973-09-12
JP48102269A JPS5814047B2 (ja) 1972-09-13 1973-09-12 磁気記録材料の製造方法
GB4289873A GB1436140A (en) 1972-09-13 1973-09-12 Magnetic materials
BE135629A BE804829A (fr) 1972-09-13 1973-09-13 Materiau pour l'enregistrement magnetique a haute resolution
NL7312614A NL7312614A (xx) 1972-09-13 1973-09-13

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7232367A FR2199155B1 (xx) 1972-09-13 1972-09-13

Publications (2)

Publication Number Publication Date
FR2199155A1 FR2199155A1 (xx) 1974-04-05
FR2199155B1 true FR2199155B1 (xx) 1978-04-28

Family

ID=9104193

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7232367A Expired FR2199155B1 (xx) 1972-03-01 1972-09-13

Country Status (9)

Country Link
JP (1) JPS5814047B2 (xx)
BE (1) BE804829A (xx)
CH (1) CH581075A5 (xx)
DD (1) DD105920A5 (xx)
DE (1) DE2343562C3 (xx)
FR (1) FR2199155B1 (xx)
GB (1) GB1436140A (xx)
IT (1) IT995315B (xx)
NL (1) NL7312614A (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2801452C2 (de) * 1978-01-13 1985-03-28 Agfa-Gevaert Ag, 5090 Leverkusen Magnetisches Aufzeichnungsmaterial
US4778719A (en) * 1986-08-25 1988-10-18 Eastman Kodak Company Particulate magnetic recording media and method of manufacture thereof

Also Published As

Publication number Publication date
NL7312614A (xx) 1974-03-15
DE2343562A1 (de) 1974-03-28
JPS4969104A (xx) 1974-07-04
BE804829A (fr) 1974-03-13
JPS5814047B2 (ja) 1983-03-17
IT995315B (it) 1975-11-10
DE2343562C3 (de) 1978-09-28
DD105920A5 (xx) 1974-05-12
DE2343562B2 (de) 1978-02-02
CH581075A5 (xx) 1976-10-29
FR2199155A1 (xx) 1974-04-05
GB1436140A (en) 1976-05-19

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Legal Events

Date Code Title Description
ST Notification of lapse