US3525883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bridge amplifier circuit
Assignee: Dover Corp
•
Filing: 1967-07-28
•
Granted: 1970-08-25
•
Expires: 1987-07-28
Abstract
No abstract record available.
Inventors
- 👤 Demetre Iordanidis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:23
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/217; H02; H02P; H02P7/00; H02P7/03; H02P7/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2838675A
Cited
US3009070A
Cited
US3031588A
Cited
US3078379A
Cited
US3191121A
Cited
US3174058A
Cited
US3182210A
Cited
US3437842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-24 | 1974-02-23 | 1974-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-24 | 1978-02-23 | 1978-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-24 | 1982-02-23 | 1982-08-25 | $7700.00 | Window Closed / Lapsed |