US2821626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse amplitude discriminator
Assignee: Tracerlab Inc
•
Filing: 1953-08-11
•
Granted: 1958-01-28
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Expires: 1973-08-11
Abstract
No abstract record available.
Inventors
- 👤 Melvin B Freedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:37
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/05; H03K3/06; H03K3/12; H03K3/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2381920A
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US2494353A
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US2418364A
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US2435207A
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US2543462A
Cited
US2644887A
Cited
US2683806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-27 | 1961-07-29 | 1962-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-27 | 1965-07-29 | 1966-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-27 | 1969-07-29 | 1970-01-28 | $7700.00 | Window Closed / Lapsed |