FR2185840A1 - - Google Patents
Info
- Publication number
- FR2185840A1 FR2185840A1 FR7318369A FR7318369A FR2185840A1 FR 2185840 A1 FR2185840 A1 FR 2185840A1 FR 7318369 A FR7318369 A FR 7318369A FR 7318369 A FR7318369 A FR 7318369A FR 2185840 A1 FR2185840 A1 FR 2185840A1
- 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
Links
Classifications
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- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/42—Magnetic properties
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
- Hard Magnetic Materials (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT2477372A IT955797B (it) | 1972-05-24 | 1972-05-24 | Biossido di cromo stabilizzato |
| IT2139873A IT1045821B (it) | 1973-03-09 | 1973-03-09 | Biossido di cromo stabilizzato |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2185840A1 true FR2185840A1 (US07696358-20100413-C00002.png) | 1974-01-04 |
| FR2185840B1 FR2185840B1 (US07696358-20100413-C00002.png) | 1976-06-11 |
Family
ID=26327886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7318369A Expired FR2185840B1 (US07696358-20100413-C00002.png) | 1972-05-24 | 1973-05-21 |
Country Status (8)
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2386486A1 (fr) * | 1977-04-07 | 1978-11-03 | Montedison Spa | Bioxyde de chrome ferromagnetique stabilise et son procede de preparation |
| EP0055994A2 (en) * | 1981-01-06 | 1982-07-14 | Koninklijke Philips Electronics N.V. | Magnetic recording element and method of manufacturing same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132005A (en) * | 1979-04-02 | 1980-10-14 | Ken Namikawa | Ferromagnetic powder and manufacture therefor |
| US4382982A (en) * | 1979-12-07 | 1983-05-10 | Ici Australia Limited | Process for protecting magnetic particles with chromium oxide |
| DE3610411A1 (de) * | 1986-03-27 | 1987-10-01 | Basf Ag | Verfahren zur stabilisierung von nadelfoermigem ferromagnetischem chromdioxid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686031A (en) * | 1969-11-26 | 1972-08-22 | Du Pont | Metal phosphate coated ferromagnetic chromium oxide and its preparation |
-
1973
- 1973-05-17 NL NL7306877A patent/NL7306877A/xx not_active Application Discontinuation
- 1973-05-17 SE SE7306969A patent/SE404274B/xx unknown
- 1973-05-18 CA CA171,801A patent/CA1013130A/en not_active Expired
- 1973-05-18 CH CH722473A patent/CH604343A5/xx not_active IP Right Cessation
- 1973-05-21 FR FR7318369A patent/FR2185840B1/fr not_active Expired
- 1973-05-21 DE DE19732325719 patent/DE2325719A1/de active Pending
- 1973-05-24 JP JP48057287A patent/JPS4949898A/ja active Pending
- 1973-05-24 GB GB2495073A patent/GB1435392A/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3686031A (en) * | 1969-11-26 | 1972-08-22 | Du Pont | Metal phosphate coated ferromagnetic chromium oxide and its preparation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2386486A1 (fr) * | 1977-04-07 | 1978-11-03 | Montedison Spa | Bioxyde de chrome ferromagnetique stabilise et son procede de preparation |
| EP0055994A2 (en) * | 1981-01-06 | 1982-07-14 | Koninklijke Philips Electronics N.V. | Magnetic recording element and method of manufacturing same |
| EP0055994A3 (en) * | 1981-01-06 | 1982-08-04 | N.V. Philips' Gloeilampenfabrieken | Magnetic recording element and method of manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2185840B1 (US07696358-20100413-C00002.png) | 1976-06-11 |
| SE404274B (sv) | 1978-09-25 |
| CH604343A5 (US07696358-20100413-C00002.png) | 1978-09-15 |
| CA1013130A (en) | 1977-07-05 |
| GB1435392A (en) | 1976-05-12 |
| NL7306877A (US07696358-20100413-C00002.png) | 1973-11-27 |
| DE2325719A1 (de) | 1973-12-13 |
| JPS4949898A (US07696358-20100413-C00002.png) | 1974-05-15 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |