US3448302A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Operating circuit for phase change memory devices
Assignee: TDK Micronas GmbH
•
Filing: 1966-06-16
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Granted: 1969-06-03
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Expires: 1986-06-16
Abstract
No abstract record available.
Inventors
- 👤 Daniel J Shanefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:07
CPC Classifications
G; G11; G11C; G11C13/00; G11C13/0002; G11C13/0004; G11C13/0021; G11C13/004; G11C13/0069; H; H03; H03K; H03K3/00; H03K3/02; H03K3/313
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2948837A
Cited
US3271591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |