FR2002166A1 - - Google Patents

Info

Publication number
FR2002166A1
FR2002166A1 FR6903973A FR6903973A FR2002166A1 FR 2002166 A1 FR2002166 A1 FR 2002166A1 FR 6903973 A FR6903973 A FR 6903973A FR 6903973 A FR6903973 A FR 6903973A FR 2002166 A1 FR2002166 A1 FR 2002166A1
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.)
Granted
Application number
FR6903973A
Other versions
FR2002166B1 (fr
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of FR2002166A1 publication Critical patent/FR2002166A1/fr
Application granted granted Critical
Publication of FR2002166B1 publication Critical patent/FR2002166B1/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
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
    • 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
    • G11B5/70668—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 containing a dopant
    • G11B5/70673—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 containing a dopant containing Co
FR6903973A 1968-02-19 1969-02-18 Expired FR2002166B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70640168A 1968-02-19 1968-02-19

Publications (2)

Publication Number Publication Date
FR2002166A1 true FR2002166A1 (fr) 1969-10-17
FR2002166B1 FR2002166B1 (fr) 1974-09-20

Family

ID=24837392

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6903973A Expired FR2002166B1 (fr) 1968-02-19 1969-02-18

Country Status (7)

Country Link
US (1) US3573980A (fr)
AT (1) AT302971B (fr)
BE (1) BE767448Q (fr)
DE (1) DE1907236B2 (fr)
FR (1) FR2002166B1 (fr)
GB (1) GB1264994A (fr)
NL (1) NL6902011A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513419A1 (fr) * 1981-09-24 1983-03-25 Hitachi Maxell Support d'enregistrement magnetique et son procede de production

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4922630B1 (fr) * 1970-06-23 1974-06-10
US3671435A (en) * 1971-07-16 1972-06-20 Ampex Cobalt doped gamma ferric oxide
CA988704A (en) * 1971-07-19 1976-05-11 Akira Okazoe Ferro-magnetic acicular particles for recording medium
US3775178A (en) * 1971-08-26 1973-11-27 Minnesota Mining & Mfg Dual-layer quadruplex video recording tape
US4122216A (en) * 1971-10-19 1978-10-24 Hitachi Maxell, Ltd. Ferro-magnetic acicular particles for recording medium and process for preparing the same
US3897354A (en) * 1972-04-29 1975-07-29 Bayer Ag Cobalt-containing acicular ferrimagnetic iron oxide of improved remanence stability
US3859129A (en) * 1972-05-26 1975-01-07 Corning Glass Works Method of improving the magnetic properties of cobalt substituted magnetite
JPS5321119B2 (fr) * 1973-03-20 1978-06-30
DE2254810C2 (de) * 1972-11-09 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Verbesserung der magnetischen Eigenschaften von Gamma-Eisen (III)oxiden
US4010310A (en) * 1973-03-20 1977-03-01 Tdk Electronics Company, Limited Magnetic powder
JPS5242363B2 (fr) * 1973-03-20 1977-10-24
US3873462A (en) * 1973-04-27 1975-03-25 American Cyanamid Co Cobalt modified iron oxides
GB1482157A (en) * 1974-05-06 1977-08-10 Pfizer Cobalt acicular gamma ferric oxide
JPS5719049B2 (fr) * 1974-06-13 1982-04-20
JPS604566B2 (ja) * 1974-06-28 1985-02-05 富士写真フイルム株式会社 強磁性粉末及びこれを使用した磁気記録体の安定化方法
US4112184A (en) * 1975-09-25 1978-09-05 Tdk Electronic Company Magnetic recording medium and method of preparing
AT345252B (de) * 1975-10-31 1978-09-11 Unibra Sa Verfahren zur herstellung von magnetoxiden
US4086174A (en) * 1976-01-13 1978-04-25 Pfizer Inc. Cobalt modified acicular γ ferric oxide and process for preparing the same
DE2639250C2 (de) * 1976-09-01 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid
DE2650890C2 (de) * 1976-11-06 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem, magnetischem Eisenoxid
JPS54122664A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
JPS54122663A (en) 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
US4209412A (en) * 1978-05-22 1980-06-24 Hercules Incorporated Process for producing nonstoichiometric ferroso-ferric oxides
US4276183A (en) * 1978-10-25 1981-06-30 Pfizer Inc. Cobalt modified magnetic iron oxide
DE2903593C3 (de) * 1979-01-31 1982-05-06 Bayer Ag, 5090 Leverkusen Kobalt-dotierte ferrimagnetische Eisenoxide und Verfahren zu deren Herstellung
DE2905351A1 (de) * 1979-02-13 1980-08-21 Basf Ag Verfahren zur herstellung von nadelfoermigem kobalthaltigem, magnetischem eisenoxid
DE2905352A1 (de) * 1979-02-13 1980-08-21 Basf Ag Verfahren zur herstellung von nadelfoermigem kobalthaltigem magnetischem eisenoxid
US4554088A (en) * 1983-05-12 1985-11-19 Advanced Magnetics Inc. Magnetic particles for use in separations
JPS6028025A (ja) * 1983-07-26 1985-02-13 Fuji Photo Film Co Ltd 磁気記録媒体
DE3407722A1 (de) * 1984-03-02 1985-09-05 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung kobalthaltiger, isotroper magnetischer eisenoxide
DE3438093A1 (de) * 1984-10-18 1986-04-24 Basf Ag, 6700 Ludwigshafen Ferrimagnetische teilchen und verfahren zu ihrer herstellung
DE3616096A1 (de) * 1986-05-13 1987-11-19 Basf Ag Verfahren zur herstellung kobalthaltiger, nadelfoermiger, magnetischer eisenoxide
US5069216A (en) * 1986-07-03 1991-12-03 Advanced Magnetics Inc. Silanized biodegradable super paramagnetic metal oxides as contrast agents for imaging the gastrointestinal tract
US5219554A (en) * 1986-07-03 1993-06-15 Advanced Magnetics, Inc. Hydrated biodegradable superparamagnetic metal oxides
DE3912976A1 (de) * 1989-04-20 1990-10-25 Basf Ag Nadelfoermige, kobaltmodifizierte eisenoxide und verfahren zu ihrer herstellung
DE4319572A1 (de) * 1993-06-14 1994-12-15 Toda Kogyo Corp Co-haltige Eisenoxidpigmente, Verfahren zu ihrer Herstellung und diese enthaltende magnetische Medien
US5484628A (en) * 1993-08-18 1996-01-16 Basf Magnetics Gmbh Preparation of acicular cobalt-containing magnetic iron oxide
EP2530125A1 (fr) 2011-05-30 2012-12-05 Total SA Particules coeur/enveloppe dotées d'une activité catalytique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE549383A (fr) *

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE549383A (fr) *

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
REVUE AMERICAINE "IBM TECHNICAL DISCLOSURE BULLETIN" VOLUME 10 N 2 ARTICLE DE J.H. DEPEW, J.S. JUDGE, J.R. MORRISON T D.E. SPELIOTIS "MAGNETIC TRNSFERTD MEDIA" *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2513419A1 (fr) * 1981-09-24 1983-03-25 Hitachi Maxell Support d'enregistrement magnetique et son procede de production
EP0075991A2 (fr) * 1981-09-24 1983-04-06 Hitachi Maxell Ltd. Milieu d'enregistrement magnétique et procédé pour sa fabrication
EP0075991A3 (fr) * 1981-09-24 1984-09-26 Hitachi Maxell Ltd. Milieu d'enregistrement magnétique et procédé pour sa fabrication

Also Published As

Publication number Publication date
US3573980A (en) 1971-04-06
AT302971B (de) 1972-11-10
DE1907236B2 (de) 1972-10-19
BE767448Q (fr) 1971-10-18
DE1907236A1 (de) 1971-01-21
FR2002166B1 (fr) 1974-09-20
NL6902011A (fr) 1969-08-21
GB1264994A (fr) 1972-02-23

Similar Documents

Publication Publication Date Title
AU1946070A (fr)
FR2002166A1 (fr)
AU428130B2 (fr)
AU2374870A (fr)
AU5184069A (fr)
AU6168869A (fr)
AU6171569A (fr)
AU416157B2 (fr)
AU429879B2 (fr)
AU2581067A (fr)
AU4811568A (fr)
AU421558B1 (fr)
AU2580267A (fr)
AU4744468A (fr)
AU3789668A (fr)
AU3224368A (fr)
AR203075Q (fr)
AU4503667A (fr)
AU5758767A (fr)
AU2496167A (fr)
BE727819A (fr)
AU4464266A (fr)
AU4558658A (fr)
AU463027A (fr)
AU4270368A (fr)

Legal Events

Date Code Title Description
ST Notification of lapse