US3500346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driving plates for magnetic films
Assignee: Toshiba Corp
•
Filing: 1964-08-13
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Granted: 1970-03-10
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Expires: 1984-08-13
Abstract
No abstract record available.
Inventors
- 👤 Koichi Takeuchi
- 👤 Asao Shikama
- 👤 Shozo Takeno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:50
CPC Classifications
G; G11; G11C; G11C5/00; G11C5/02; G11C5/04; G11C5/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49069; Y10T29/49075; Y10T29/49078; Y10T29/49117; Y10T29/49124; Y10T29/49126
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) | 1973-03-09 | 1973-09-08 | 1974-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-09 | 1977-09-08 | 1978-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-09 | 1981-09-08 | 1982-03-10 | $7700.00 | Window Closed / Lapsed |