US3411048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor integrated circuitry with improved isolation between active and passive elements
Assignee: AT&T Inc
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Filing: 1965-05-19
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Granted: 1968-11-12
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Expires: 1985-05-19
Abstract
No abstract record available.
Inventors
- 👤 Martin P Lepselter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:10
CPC Classifications
H; H04; H04R; H04R23/00; H04R23/006; H10; H10W; H10W20/00; H10W20/40; H10W74/00; H10W74/40; H10W74/43
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) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |