Patent US2906871A successfully refreshed from Google Patents.
US2906871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode clipping circuit
Assignee: International Business Machines Corp
•
Filing: 1954-11-10
•
Granted: 1959-09-29
•
Expires: 1974-11-10
Abstract
No abstract record available.
Inventors
- 👤 David J Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:00
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2144995A
Cited
US2221700A
Cited
US2434929A
Cited
US2469860A
Cited
US2497693A
Cited
US2644887A
Cited
US2821626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |