US4068038A
Expired / Lapsed
US
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Stabilized chromium dioxide compositions
Assignee: Montedison SpA
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Filing: 1975-09-02
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Granted: 1978-01-10
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Expires: 1995-09-02
Abstract
Abstract Composition comprising a highly ferromagnetic CrO 2 having deposited on the surface thereof an insoluble or sparingly soluble compound, thereby rendering the composition essentially non-reactive to water or oxidizable organic substances. Compound comprises either an oxide or hydroxide of Si and/or Ti.
Inventors
- 👤 Ugo Montiglio
- 👤 Pierfrancesco Aspes
- 👤 Carlo Scotti
- 👤 Giampiero Basile
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:35
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70636; C; C01; C01G; C01G37/00; C01G37/02; C01P; C01P2004/00; C01P2004/10; C01P2004/50; C01P2004/54; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/80; C01P2004/82; C01P2004/84; C01P2006/00; C01P2006/42; C01P2006/80; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
57 words
A stabilized composition consisting essentially of ferromagnetic chromium dioxide particles having deposited on the surface thereof a coating consisting of at least one compound selected from the group consisting of hydrated and anhydrous oxides of silicon, said compound being present in an amount of from about 0.1 to 25 percent by weight based on the chromium dioxide.
Claim 2
Dependent Claim
57 words
A stabilized composition consisting essentially of ferromagnetic chromium dioxide particles having deposited on the surface thereof a coating consisting of at least one compound selected from the group consisting of hydrated and anhydrous oxides of silicon, said compound being present in an amount of from about 0.1 to 25 percent by weight based on the chromium dioxide.
Claim 3
Dependent Claim
14 words
The composition of claim 1, wherein said chromium dioxide is a modified chromium dioxide.
Claim 4
Dependent Claim
22 words
The composition of claim 1, wherein said compound is present in an amount of from about 0.1 to 10 percent by weight.
Claim 5
Dependent Claim
58 words
A stabilized composition consisting essentially of ferromagnetic chromium dioxide particles having deposited on the surface thereof a coating consisting essentially of at least one compound selected from the group consisting of hydrated and anhydrous oxides of titanium, said compound being present in an amount of from about 0.1 to 25 percent by weight based on the chromium dioxide.
Claim 6
Dependent Claim
58 words
A stabilized composition consisting essentially of ferromagnetic chromium dioxide particles having deposited on the surface thereof a coating consisting essentially of at least one compound selected from the group consisting of hydrated and anhydrous oxides of titanium, said compound being present in an amount of from about 0.1 to 25 percent by weight based on the chromium dioxide.
Claim 7
Dependent Claim
14 words
The composition of claim 4, wherein said chromium dioxide is a modified chromium dioxide.
Claim 8
Dependent Claim
22 words
The composition of claim 4, wherein said compound is present in an amount of from about 0.1 to 10 percent by weight.
Claim 9
Dependent Claim
49 words
A stabilized composition consisting essentially of ferromagnetic chromium dioxide particles having deposited on the surface thereof a coating consisting of hydrated or anhydrous oxides of silicon and titanium, said coating being present in an amount of from about 0.1 to 25 percent by weight based on the chromium dioxide.
Claim 10
Dependent Claim
49 words
A stabilized composition consisting essentially of ferromagnetic chromium dioxide particles having deposited on the surface thereof a coating consisting of hydrated or anhydrous oxides of silicon and titanium, said coating being present in an amount of from about 0.1 to 25 percent by weight based on the chromium dioxide.
Claim 11
Dependent Claim
14 words
The composition of claim 7, wherein said chromium dioxide is a modified chromium dioxide.
Claim 12
Dependent Claim
22 words
The composition of claim 7, wherein said compound is present in an amount of from about 0.1 to 10 percent by weight.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |