US2849606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amplitude comparison circuit
Assignee: Individual
•
Filing: 1953-03-25
•
Granted: 1958-08-26
•
Expires: 1973-03-25
Abstract
No abstract record available.
Inventors
- 👤 Sydney R Parker
- 👤 Fischer Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:04
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2233596A
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US2265620A
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US2470573A
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US2441418A
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US2721899A
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US2619632A
Cited
US2674691A
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US2695953A
Cited
US2763721A
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US2726329A
Cited
US2778978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |