US2504976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic pulse discriminator circuit
Assignee: STC PLC
•
Filing: 1945-11-30
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Granted: 1950-04-25
•
Expires: 1965-11-30
Abstract
No abstract record available.
Inventors
- 👤 Donald D Grieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:21
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; H; H03; H03K; H03K9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2236015A
Cited
US2418127A
Cited
US2440278A
Cited
US2434937A
Cited
US2408079A
Cited
US2429616A
Cited
US2434922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-24 | 1953-10-24 | 1954-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-24 | 1957-10-24 | 1958-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-24 | 1961-10-24 | 1962-04-25 | $7700.00 | Window Closed / Lapsed |