Patent US3408505A successfully refreshed from Google Patents.
US3408505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic timing via magnetic core shift circuitry
Assignee: C and K Components Inc
•
Filing: 1963-12-18
•
Granted: 1968-10-29
•
Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Jr Charles A Coolidge
- 👤 Marshall M Kincaid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:50
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K23/00; H03K23/76; H03K5/00; H03K5/13
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3299401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |