FR2363520B1 - - Google Patents
Info
- Publication number
- FR2363520B1 FR2363520B1 FR7723451A FR7723451A FR2363520B1 FR 2363520 B1 FR2363520 B1 FR 2363520B1 FR 7723451 A FR7723451 A FR 7723451A FR 7723451 A FR7723451 A FR 7723451A FR 2363520 B1 FR2363520 B1 FR 2363520B1
- 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
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
- G11B5/70636—CrO2
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G37/00—Compounds of chromium
- C01G37/02—Oxides or hydrates thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Hard Magnetic Materials (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Compounds Of Iron (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/719,167 US4045544A (en) | 1976-08-31 | 1976-08-31 | Process for the preparation of ferromagnetic chromium dioxide |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2363520A1 FR2363520A1 (fr) | 1978-03-31 |
| FR2363520B1 true FR2363520B1 (show.php) | 1981-07-24 |
Family
ID=24889010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7723451A Granted FR2363520A1 (fr) | 1976-08-31 | 1977-07-29 | Procede de preparation de bioxyde de chrome ferromagnetique |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4045544A (show.php) |
| JP (1) | JPS609323B2 (show.php) |
| BE (1) | BE857302A (show.php) |
| CA (1) | CA1091919A (show.php) |
| DE (1) | DE2727891C3 (show.php) |
| FR (1) | FR2363520A1 (show.php) |
| GB (1) | GB1556929A (show.php) |
| NL (1) | NL178311C (show.php) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428852A (en) | 1982-01-18 | 1984-01-31 | E. I. Du Pont De Nemours And Company | Continuous synthesis of chromium dioxide |
| US4495246A (en) * | 1983-10-27 | 1985-01-22 | Basf Aktiengesellschaft | Acicular ferromagnetic chromium dioxide particles |
| DE3609971A1 (de) * | 1986-03-25 | 1987-10-01 | Basf Ag | Verfahren zur herstellung von chrom(iii)oxid, eine vorrichtung zur durchfuehrung des verfahrens sowie die verwendung des chrom(iii)oxids als ausgangsmaterial fuer die chromdioxid-synthese |
| US4698220A (en) * | 1986-03-28 | 1987-10-06 | E. I. Du Pont De Nemours And Company | Partitioned reduction process for ferromagnetic chromium dioxide |
| US4747974A (en) * | 1986-03-28 | 1988-05-31 | E. I. Dupont De Nemours And Company | Mixed Cr2 O3 paste for CrO2 synthesis |
| US4769165A (en) * | 1987-01-20 | 1988-09-06 | E. I. Du Pont De Nemours And Company | Process for synthesis of ferromagnetic chromium dioxide |
| DE3819779A1 (de) * | 1988-06-10 | 1989-12-21 | Bayer Ag | Verbessertes chromoxidgruen, verfahren zu seiner herstellung und dessen verwendung |
| EP0546342B1 (en) * | 1991-11-14 | 1996-08-14 | Matsushita Electric Industrial Co., Ltd. | A self-metabolic functional material |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2956955A (en) * | 1960-02-12 | 1960-10-18 | Du Pont | Ferromagnetic chromium oxide and method of making |
| US3278263A (en) * | 1964-11-27 | 1966-10-11 | Du Pont | Ferromagnetic chromium dioxide and preparation thereof |
| JPS5021992B1 (show.php) * | 1968-02-17 | 1975-07-26 | ||
| JPS4828277B1 (show.php) * | 1970-12-14 | 1973-08-30 |
-
1976
- 1976-08-31 US US05/719,167 patent/US4045544A/en not_active Expired - Lifetime
-
1977
- 1977-06-21 DE DE2727891A patent/DE2727891C3/de not_active Expired
- 1977-06-29 BE BE179762A patent/BE857302A/xx not_active IP Right Cessation
- 1977-07-27 CA CA283,629A patent/CA1091919A/en not_active Expired
- 1977-07-29 GB GB32011/77A patent/GB1556929A/en not_active Expired
- 1977-07-29 NL NLAANVRAGE7708419,A patent/NL178311C/xx not_active IP Right Cessation
- 1977-07-29 FR FR7723451A patent/FR2363520A1/fr active Granted
- 1977-07-30 JP JP52090967A patent/JPS609323B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2727891B2 (de) | 1980-04-24 |
| BE857302A (fr) | 1978-01-30 |
| NL178311B (nl) | 1985-10-01 |
| CA1091919A (en) | 1980-12-23 |
| US4045544A (en) | 1977-08-30 |
| JPS609323B2 (ja) | 1985-03-09 |
| DE2727891C3 (de) | 1980-12-11 |
| NL178311C (nl) | 1986-03-03 |
| DE2727891A1 (de) | 1978-03-02 |
| GB1556929A (en) | 1979-12-05 |
| JPS5329598A (en) | 1978-03-18 |
| FR2363520A1 (fr) | 1978-03-31 |
| NL7708419A (nl) | 1978-03-02 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |