Patent US3492503A successfully refreshed from Google Patents.
US3492503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching circuitry for reducing the time required to turn off a saturated semiconductor device
Assignee: AMAR G BOSE
•
Filing: 1966-08-09
•
Granted: 1970-01-27
•
Expires: 1986-08-09
Abstract
No abstract record available.
Inventors
- 👤 Amar G Bose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:11
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/04; H03K17/042; H03K17/0422
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3289008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |