US3243260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing cro2 of rutile type crystalline structure
Assignee: Panasonic Holdings Corp
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Filing: 1962-06-11
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Granted: 1966-03-29
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Expires: 1982-06-11
Abstract
No abstract record available.
Inventors
- 👤 Kubota Buichi
- 👤 Nishikawa Tomozo
- 👤 Chiba Hiroyuki
- 👤 Sugimura Minorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:46
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; C01P2002/00; C01P2002/70; C01P2002/72; C01P2004/00; C01P2004/10; C01P2004/60; C01P2004/61; C01P2004/62; C01P2006/00; C01P2006/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
34 words
A PROCESS FOR PRODUCING A RUTILE TYPE FERROMAGNETIC CHROMIUM DIOXIDE WHICH COMPRISES HEATING A MIXTURE OF CHROMIUM TRIOXIDE AND A TELLURIUM COMPOUND AT A TEMPERATURE BETWEEN 380*C. AND 480*C. IN THE PRESENCE OF OXYGEN.
Claim 2
Dependent Claim
34 words
A PROCESS FOR PRODUCING A RUTILE TYPE FERROMAGNETIC CHROMIUM DIOXIDE WHICH COMPRISES HEATING A MIXTURE OF CHROMIUM TRIOXIDE AND A TELLURIUM COMPOUND AT A TEMPERATURE BETWEEN 380*C. AND 480*C. IN THE PRESENCE OF OXYGEN.
References Cited (Backward Citations)
US3080319A
Cited
US2956955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |