US3471795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide range constant current gain amplifier
Assignee: International Standard Electric Corp
•
Filing: 1967-05-02
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Granted: 1969-10-07
•
Expires: 1987-05-02
Abstract
No abstract record available.
Inventors
- 👤 Harald Schilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:20
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/211; H03F3/72; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3005; H03G3/3026
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB965421A
Cited
US3225209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |