US2856468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Negative feedback amplifier in a measuring system
Assignee: Consolidated Electrodynamics Corp
•
Filing: 1952-10-27
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Granted: 1958-10-14
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Expires: 1972-10-27
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Berry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:17
CPC Classifications
H; H01; H01J; H01J49/00; H01J49/02; H01J49/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2215777A
Cited
US2556070A
Cited
US2607528A
Cited
US2513454A
Cited
GB629260A
Cited
US2681952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-13 | 1962-04-14 | 1962-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-13 | 1966-04-14 | 1966-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-13 | 1970-04-14 | 1970-10-14 | $7700.00 | Window Closed / Lapsed |