US3487323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balanced differential amplifier with dual collector current regulating means
Assignee: Technipower Inc
•
Filing: 1968-06-04
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Granted: 1969-12-30
•
Expires: 1988-06-04
Abstract
No abstract record available.
Inventors
- 👤 Johannes M Schaefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:27
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3250981A
Cited
US3341785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |