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US3423647A
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Semiconductor device having regions with preselected different minority carrier lifetimes
Assignee: NEC Corp
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Filing: 1965-07-28
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Granted: 1969-01-21
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Expires: 1985-07-28
Abstract
No abstract record available.
Inventors
- 👤 Toshio Kurosawa
- 👤 Hiroshi Shiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:57
CPC Classifications
H; H10; H10D; H10D84/00; H10D84/01; H10D84/0123; H10D84/0126; H10D84/0158; H10D84/60; H10D84/611; H10D84/613; Y; Y10; Y10S; Y10S148/00; Y10S148/062; Y10S257/00; Y10S257/928; Y10S438/00; Y10S438/904; Y10S438/914; Y10S438/917
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) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |