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Patent US3517280A successfully refreshed from Google Patents.
US3517280A
Expired / Lapsed
US
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Four layer diode device insensitive to rate effect and method of manufacture
Assignee: International Business Machines Corp
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Filing: 1967-10-17
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Granted: 1970-06-23
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Expires: 1987-10-17
Abstract
No abstract record available.
Inventors
- 👤 Laurence L Rosier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:43
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/60; H10D84/611; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H10W; H10W15/00; H10W15/01
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) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |