BE728310A - - Google Patents
Info
- Publication number
- BE728310A BE728310A BE728310DA BE728310A BE 728310 A BE728310 A BE 728310A BE 728310D A BE728310D A BE 728310DA BE 728310 A BE728310 A BE 728310A
- Authority
- BE
- Belgium
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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/51—Particles with a specific particle size distribution
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- 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)
- Hard Magnetic Materials (AREA)
- Soft Magnetic Materials (AREA)
- Compounds Of Iron (AREA)
- Magnetic Record Carriers (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70502968A | 1968-02-13 | 1968-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE728310A true BE728310A (US20020051482A1-20020502-M00012.png) | 1969-08-12 |
Family
ID=24831768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE728310D BE728310A (US20020051482A1-20020502-M00012.png) | 1968-02-13 | 1969-02-12 |
Country Status (9)
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4843436B1 (US20020051482A1-20020502-M00012.png) * | 1970-10-20 | 1973-12-18 | ||
| SE389220B (sv) * | 1972-06-30 | 1976-10-25 | Montedison Spa | Sett for framstellning av ferromagnetisk krondioxid med fin och homogen granulometri vilket sett medfor utvalda magnetiska egenskaper |
| IT1012202B (it) * | 1974-05-09 | 1977-03-10 | Montedison Spa | Procedimento per la produzione di biossido di cromo ferromagnetico |
| GB1516774A (en) * | 1975-10-10 | 1978-07-05 | Anvar | Process for preparing chromium dioxide |
| GB1550852A (en) * | 1975-12-08 | 1979-08-22 | Ibm | Process for treating chromium dioxice |
| IT1209139B (it) * | 1979-11-16 | 1989-07-10 | Montedison Spa | Procedimento per stabilizzare il biossido di cromo ferromagnetico. |
| EP0078042B1 (en) * | 1981-10-26 | 1985-04-10 | E.I. Du Pont De Nemours And Company | Surface modified ferromagnetic chromium dioxide |
| DE3240337A1 (de) * | 1982-10-30 | 1984-05-03 | Basf Ag, 6700 Ludwigshafen | Nadelfoermige ferromagnetische chromdioxidteilchen |
| US4495246A (en) * | 1983-10-27 | 1985-01-22 | Basf Aktiengesellschaft | Acicular ferromagnetic chromium dioxide particles |
| JPH0743824B2 (ja) * | 1986-06-04 | 1995-05-15 | 日立マクセル株式会社 | 磁気記録媒体およびその製造方法 |
| DE3819575A1 (de) * | 1988-06-09 | 1989-12-14 | Kloeckner Moeller Elektrizit | Stromschiene fuer schienenverteiler, schaltanlagen und dergleichen |
| DE3837646A1 (de) * | 1988-11-05 | 1990-05-10 | Basf Ag | Nadelfoermiges, im wesentlichen aus chromdioxid bestehendes, ferromagnetisches material |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2714054A (en) * | 1952-02-15 | 1955-07-26 | Houdry Process Corp | Method of treating chromic oxide |
| US2885365A (en) * | 1956-10-22 | 1959-05-05 | Du Pont | Ruthenium-modified chromium oxide ferromagnetic compositions, their pre-aration and use |
| FR1407333A (fr) * | 1963-07-24 | 1965-07-30 | Bayer Ag | Bioxyde de chrome ferromagnétique modifié |
| US3278263A (en) * | 1964-11-27 | 1966-10-11 | Du Pont | Ferromagnetic chromium dioxide and preparation thereof |
-
1968
- 1968-02-13 US US705029A patent/US3529930A/en not_active Expired - Lifetime
-
1969
- 1969-01-23 CA CA040992A patent/CA924614A/en not_active Expired
- 1969-02-05 DE DE19691905584 patent/DE1905584C3/de not_active Expired
- 1969-02-11 NL NL6902146.A patent/NL163659C/xx not_active IP Right Cessation
- 1969-02-12 BE BE728310D patent/BE728310A/xx not_active IP Right Cessation
- 1969-02-12 LU LU57982D patent/LU57982A1/xx unknown
- 1969-02-12 FR FR6903349A patent/FR2001806B1/fr not_active Expired
- 1969-02-13 GB GB8000/69A patent/GB1200856A/en not_active Expired
-
1973
- 1973-12-30 MY MY326/73A patent/MY7300326A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE1905584A1 (de) | 1970-02-05 |
| CA924614A (en) | 1973-04-17 |
| NL163659B (nl) | 1980-04-15 |
| DE1905584B2 (US20020051482A1-20020502-M00012.png) | 1970-10-29 |
| NL163659C (nl) | 1980-09-15 |
| FR2001806A1 (US20020051482A1-20020502-M00012.png) | 1969-10-03 |
| US3529930A (en) | 1970-09-22 |
| NL6902146A (US20020051482A1-20020502-M00012.png) | 1969-08-15 |
| MY7300326A (en) | 1973-12-31 |
| LU57982A1 (US20020051482A1-20020502-M00012.png) | 1970-09-08 |
| DE1905584C3 (de) | 1971-06-24 |
| GB1200856A (en) | 1970-08-05 |
| FR2001806B1 (US20020051482A1-20020502-M00012.png) | 1973-12-21 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE20 | Patent expired |
Owner name: E.I. DU PONT DE NEMOURS AND CY Effective date: 19890212 |