US3409809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor or write tri-layered metal contact
Assignee: Irc Inc
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Filing: 1966-04-06
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Granted: 1968-11-05
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Expires: 1986-04-06
Abstract
No abstract record available.
Inventors
- 👤 Donald S Diehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:27
CPC Classifications
H; H10; H10W; H10W99/00; H10P; H10P95/00; H10W20/00; H10W20/40; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12396; Y10T428/12486; Y10T428/12493; Y10T428/12528; Y10T428/12535; Y10T428/12583; Y10T428/1259; Y10T428/12674; Y10T428/12736; Y10T428/12743; Y10T428/1275; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12861; Y10T428/12889
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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |