Patent US3473131A successfully refreshed from Google Patents.
US3473131A
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Level shift correction circuits
Assignee: Radiation Inc
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Filing: 1965-06-04
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Granted: 1969-10-14
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Expires: 1985-06-04
Abstract
No abstract record available.
Inventors
- 👤 Frank A Perkins Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/01; H03K5/08; H03K5/082; H03K5/086
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2464353A
Cited
US2607907A
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US2639379A
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US3246171A
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US3209268A
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US3252099A
Cited
US3278851A
Cited
US3273035A
Cited
US3316492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-13 | 1973-04-14 | 1973-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-13 | 1977-04-14 | 1977-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-13 | 1981-04-14 | 1981-10-14 | $7700.00 | Window Closed / Lapsed |