US2471252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-stage high-gain amplifier
Assignee: Individual
•
Filing: 1947-04-30
•
Granted: 1949-05-24
•
Expires: 1967-04-30
Abstract
No abstract record available.
Inventors
- 👤 Toulon Pierre Marie Gabriel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:10
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/40; H03F3/46; H03F3/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2169023A
Cited
US2228883A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-23 | 1952-11-22 | 1953-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-23 | 1956-11-22 | 1957-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-23 | 1960-11-22 | 1961-05-24 | $7700.00 | Window Closed / Lapsed |