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US3543104A
Expired / Lapsed
US
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Solid-state switching device including metal-semiconductor phase transition element and method for controlling same
Assignee: Hitachi Ltd
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Filing: 1969-02-13
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Granted: 1970-11-24
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Expires: 1989-02-13
Abstract
No abstract record available.
Inventors
- 👤 Jun-Ichi Umeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:13
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/10; F16L27/107; F16L27/11; H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3402131A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |