US2664528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum-enclosed semiconductor device
Assignee: RCA Corp
•
Filing: 1949-12-23
•
Granted: 1953-12-29
•
Expires: 1969-12-23
Abstract
No abstract record available.
Inventors
- 👤 John P Stelmak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:27
CPC Classifications
H; H10; H10W; H10W76/00; H10W76/40; H10W76/42; H10W76/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2468051A
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US756676A
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US817664A
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GB251706A
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US1799854A
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US2082268A
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US2209870A
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US2383735A
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US2486776A
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US2595475A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |