US3525050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for amplifying electric signals
Assignee: US Philips Corp
•
Filing: 1968-10-14
•
Granted: 1970-08-18
•
Expires: 1988-10-14
Abstract
No abstract record available.
Inventors
- 👤 Gerrit Wolf
- 👤 Robbert Carel Thuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:43
CPC Classifications
H; H03; H03G; H03G1/00; H03G1/0005; H03G1/0017; H03G1/0029; H03F; H03F3/00; H03F3/181; H03F3/183; H03F3/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3443240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-17 | 1974-02-16 | 1974-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-17 | 1978-02-16 | 1978-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-17 | 1982-02-16 | 1982-08-18 | $7700.00 | Window Closed / Lapsed |