Patent US3020488A successfully refreshed from Google Patents.
US3020488A
Expired / Lapsed
US
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Control arrangement and circuit element for electrical amplifiers
Assignee: US Philips Corp
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Filing: 1958-11-25
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Granted: 1962-02-06
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Expires: 1978-11-25
Abstract
No abstract record available.
Inventors
- 👤 Miranda Jacobus Rodrigues De
- 👤 Boon Cornelis Maria
- 👤 Deliege Jan Hubert Maria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:41
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/002; H03G7/004; H03G1/00; H03G1/0005; H03G1/0035; H03G1/0047; Y; Y10; Y10S; Y10S84/00; Y10S84/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1690224A
Cited
US1843288A
Cited
US2212337A
Cited
US2572108A
Cited
GB664644A
Cited
US2745021A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |