NL190112C - Werkwijze voor de bereiding van magnetische naaldvormige deeltjes en magnetisch registreermedium dat dergelijke magnetische naaldvormige deeltjes bevat. - Google Patents

Werkwijze voor de bereiding van magnetische naaldvormige deeltjes en magnetisch registreermedium dat dergelijke magnetische naaldvormige deeltjes bevat.

Info

Publication number
NL190112C
NL190112C NLAANVRAGE7903960,A NL7903960A NL190112C NL 190112 C NL190112 C NL 190112C NL 7903960 A NL7903960 A NL 7903960A NL 190112 C NL190112 C NL 190112C
Authority
NL
Netherlands
Prior art keywords
magnetic
needle particles
magnetic needle
medium containing
record medium
Prior art date
Application number
NLAANVRAGE7903960,A
Other languages
English (en)
Dutch (nl)
Other versions
NL7903960A (nl
NL190112B (nl
Original Assignee
Magnox Inc De
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 Magnox Inc De filed Critical Magnox Inc De
Publication of NL7903960A publication Critical patent/NL7903960A/xx
Publication of NL190112B publication Critical patent/NL190112B/xx
Application granted granted Critical
Publication of NL190112C publication Critical patent/NL190112C/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
    • G11B5/70678—Ferrites
    • G11B5/70684—Ferro-ferrioxydes
    • G11B5/70694—Non-stoechiometric ferro-ferrioxydes, e.g. berthollide
NLAANVRAGE7903960,A 1978-05-22 1979-05-21 Werkwijze voor de bereiding van magnetische naaldvormige deeltjes en magnetisch registreermedium dat dergelijke magnetische naaldvormige deeltjes bevat. NL190112C (nl)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/908,348 US4209412A (en) 1978-05-22 1978-05-22 Process for producing nonstoichiometric ferroso-ferric oxides

Publications (3)

Publication Number Publication Date
NL7903960A NL7903960A (nl) 1979-11-26
NL190112B NL190112B (nl) 1993-06-01
NL190112C true NL190112C (nl) 1993-11-01

Family

ID=25425637

Family Applications (1)

Application Number Title Priority Date Filing Date
NLAANVRAGE7903960,A NL190112C (nl) 1978-05-22 1979-05-21 Werkwijze voor de bereiding van magnetische naaldvormige deeltjes en magnetisch registreermedium dat dergelijke magnetische naaldvormige deeltjes bevat.

Country Status (6)

Country Link
US (1) US4209412A (ja)
JP (1) JPS54152699A (ja)
DE (1) DE2920733A1 (ja)
FR (1) FR2426955B1 (ja)
GB (1) GB2021089B (ja)
NL (1) NL190112C (ja)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935444A1 (de) * 1979-09-01 1981-03-19 Basf Ag, 6700 Ludwigshafen Verfahren zur herstellung von nadelfoermigen ferrimagnetischem eisenoxid
JPS5677926A (en) * 1979-11-28 1981-06-26 Tdk Corp Magnetic recording medium using cobalt adhesion type iron oxide
DE3637805A1 (de) * 1985-11-06 1987-07-16 Tdk Corp Magnetischer aufzeichnungstraeger
JP2582764B2 (ja) * 1986-02-05 1997-02-19 バスフ アクチェン ゲゼルシャフト 本質的に鉄から成る針状強磁性金属粉末の製造方法
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
MY107614A (en) * 1990-09-26 1996-05-15 Ishihara Sangyo Kaisha Acicular ferromagnetic iron oxide particles and process for producing the same
CA2175466A1 (en) * 1993-11-01 1995-05-11 Jean A. Lown Process for making goethite
US5814164A (en) * 1994-11-09 1998-09-29 American Scientific Materials Technologies L.P. Thin-walled, monolithic iron oxide structures made from steels, and methods for manufacturing such structures
US6461562B1 (en) 1999-02-17 2002-10-08 American Scientific Materials Technologies, Lp Methods of making sintered metal oxide articles
US6962685B2 (en) * 2002-04-17 2005-11-08 International Business Machines Corporation Synthesis of magnetite nanoparticles and the process of forming Fe-based nanomaterials
DE10331439B3 (de) * 2003-07-10 2005-02-03 Micromod Partikeltechnologie Gmbh Magnetische Nanopartikel mit verbesserten Magneteigenschaften
JP6380380B2 (ja) * 2013-03-29 2018-08-29 戸田工業株式会社 耐熱性黄色含水酸化鉄顔料の製造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3573980A (en) * 1968-02-19 1971-04-06 Minnesota Mining & Mfg Method of making magnetic particles and recording tape
JPS5242363B2 (ja) * 1973-03-20 1977-10-24
US3931025A (en) * 1973-09-21 1976-01-06 Bayer Aktiengesellschaft Magnetic iron oxides with improved orientability and a process for their production
JPS5820125B2 (ja) * 1974-09-20 1983-04-21 富士写真フイルム株式会社 磁気記録体
DE2507420A1 (de) * 1975-02-21 1976-08-26 Bayer Ag Remanenzstabilisierte hochkoerzitive cobalthaltige magnetische eisenoxide
JPS608606B2 (ja) * 1975-07-02 1985-03-04 富士写真フイルム株式会社 強磁性粉末の製法
DE2625106C2 (de) * 1976-06-04 1982-03-11 Bayer Ag, 5090 Leverkusen Eisenoxidschwarz-Pigmente mit verbesserter Oxidationsbeständigkeit und Verfahren zu ihrer Herstellung
DE2639250C2 (de) * 1976-09-01 1985-12-12 Basf Ag, 6700 Ludwigshafen Verfahren zur Herstellung von nadelförmigem, kobaltdotiertem magnetischem Eisenoxid
US4053325A (en) * 1976-09-14 1977-10-11 Pfizer Inc. Heat stable iron oxides

Also Published As

Publication number Publication date
GB2021089B (en) 1982-06-30
DE2920733A1 (de) 1979-11-29
JPH0134935B2 (ja) 1989-07-21
GB2021089A (en) 1979-11-28
NL7903960A (nl) 1979-11-26
DE2920733C2 (ja) 1990-09-06
FR2426955B1 (fr) 1988-07-01
NL190112B (nl) 1993-06-01
FR2426955A1 (fr) 1979-12-21
US4209412A (en) 1980-06-24
JPS54152699A (en) 1979-12-01

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Legal Events

Date Code Title Description
A85 Still pending on 85-01-01
BA A request for search or an international-type search has been filed
BB A search report has been drawn up
BC A request for examination has been filed
CNR Transfer of rights (patent application after its laying open for public inspection)

Free format text: MAGNOX INCORPORATED (DE)

V1 Lapsed because of non-payment of the annual fee

Effective date: 19961201