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US3547824A
Expired / Lapsed
US
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Tellurium-calcium modified chromium dioxide
Assignee: Panasonic Holdings Corp
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Filing: 1968-08-12
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Granted: 1970-12-15
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Expires: 1988-08-12
Abstract
No abstract record available.
Inventors
- 👤 Toshihiro Mihara
- 👤 Yukio Terada
- 👤 Eiichi Hirota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:09
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70636
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3243260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |