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US2820929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor holders
Assignee: —
•
Filing: —
•
Granted: 1958-01-21
•
Expires: 1975-01-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:53
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/20; H10W72/00; H10W72/071; H10W72/075; H10W72/07551; H10W72/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1671247A
Cited
US2197115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |