US3546122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making oxide magnetic material
Assignee: Nippon Columbia Co Ltd
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Filing: 1967-08-23
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Granted: 1970-12-08
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Expires: 1987-08-23
Abstract
No abstract record available.
Inventors
- 👤 Minoru Nishizawa
- 👤 Shigehisa Harada
- 👤 Yoshimi Tanuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:34
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2658; C04B35/2608; C04B35/2625; C04B35/2633
Claims Analysis
Total Claims: 0
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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) | 1973-12-07 | 1974-06-08 | 1974-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-07 | 1978-06-08 | 1978-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-07 | 1982-06-08 | 1982-12-08 | $7700.00 | Window Closed / Lapsed |