US3423729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-fading error correction system
Assignee: Westinghouse Electric Corp
•
Filing: 1964-06-25
•
Granted: 1969-01-21
•
Expires: 1984-06-25
Abstract
No abstract record available.
Inventors
- 👤 Ralph M Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:35
CPC Classifications
H; H03; H03M; H03M13/00; H03M13/27
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3065303A
Cited
US2744960A
Cited
US3065302A
Cited
US3093707A
Cited
US3040128A
Cited
US3114130A
Cited
US3335409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |