Patent US1626743A successfully refreshed from Google Patents.
Patent US2872592A successfully refreshed from Google Patents.
US2872592A
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Electronic amplifier
Assignee: International Business Machines Corp
•
Filing: 1950-08-03
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Granted: 1959-02-03
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Expires: 1970-08-03
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Dickinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:51
CPC Classifications
H; H03; H03K; H03K21/00; H03F; H03F5/00; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2006872A
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US2404919A
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US2494865A
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US2524035A
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US2517960A
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US2562530A
Cited
US2659775A
Cited
US2533001A
Cited
US2633528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-02 | 1962-08-04 | 1963-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-02 | 1966-08-04 | 1967-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-02 | 1970-08-04 | 1971-02-03 | $7700.00 | Window Closed / Lapsed |