FR1602986A - - Google Patents
Info
- Publication number
- FR1602986A FR1602986A FR1602986DA FR1602986A FR 1602986 A FR1602986 A FR 1602986A FR 1602986D A FR1602986D A FR 1602986DA FR 1602986 A FR1602986 A FR 1602986A
- 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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP43011887A JPS5245915B1 (fr) | 1968-02-23 | 1968-02-23 | |
JP1322068 | 1968-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR1602986A true FR1602986A (fr) | 1971-03-01 |
Family
ID=26347407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR1602986D Expired FR1602986A (fr) | 1968-02-23 | 1968-12-26 |
Country Status (5)
Country | Link |
---|---|
US (1) | US3583917A (fr) |
DE (1) | DE1771868B1 (fr) |
FR (1) | FR1602986A (fr) |
GB (1) | GB1254582A (fr) |
NL (1) | NL141313B (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3954641A (en) * | 1970-09-22 | 1976-05-04 | Matsushita Electric Industrial Co., Ltd. | Process for the preparation of sulfur modified ferromagnetic chromium oxide |
DE2353132C3 (de) * | 1972-10-23 | 1978-03-09 | Hitachi, Ltd., Tokio | Modifiziertes, ferromagnetisches Chromdioxyd und Verfahren zu seiner Herstellung |
US4018690A (en) * | 1973-04-13 | 1977-04-19 | Eastman Kodak Company | Process for preparing sulfur-containing ferromagnetic chromium oxide |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2885365A (en) * | 1956-10-22 | 1959-05-05 | Du Pont | Ruthenium-modified chromium oxide ferromagnetic compositions, their pre-aration and use |
US2923683A (en) * | 1957-06-19 | 1960-02-02 | Du Pont | Antimony-modified chromium oxide ferromagnetic compositions, their preparation and use |
US2923684A (en) * | 1957-06-19 | 1960-02-02 | Du Pont | Tin modified ferromagnetic chromium oxide, its preparation and use in recording members |
US2923685A (en) * | 1958-08-21 | 1960-02-02 | Du Pont | Alkali metal modified ferromagnetic chromium oxide, its preparation and use as the magnetic material of recording members |
US3243260A (en) * | 1961-06-12 | 1966-03-29 | Matsushita Electric Ind Co Ltd | Method for preparing cro2 of rutile type crystalline structure |
-
1968
- 1968-07-23 DE DE19681771868 patent/DE1771868B1/de active Pending
- 1968-07-31 NL NL686810872A patent/NL141313B/xx not_active IP Right Cessation
- 1968-10-22 US US769734A patent/US3583917A/en not_active Expired - Lifetime
- 1968-12-26 FR FR1602986D patent/FR1602986A/fr not_active Expired
-
1969
- 1969-02-24 GB GB9868/69A patent/GB1254582A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1254582A (en) | 1971-11-24 |
NL6810872A (fr) | 1969-08-26 |
US3583917A (en) | 1971-06-08 |
NL141313B (nl) | 1974-02-15 |
DE1771868B1 (de) | 1972-05-31 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |