US3480863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver system having visual indicator for changes in electrical state
Assignee: ELECTROSONICS INTERN Inc
•
Filing: 1964-09-01
•
Granted: 1969-11-25
•
Expires: 1984-09-01
Abstract
No abstract record available.
Inventors
- 👤 Albert Hopengarten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:31
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/12; H03J3/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3258693A
Cited
US1130633A
Cited
US2229009A
Cited
US2367299A
Cited
US2874354A
Cited
US3094652A
Cited
US3202901A
Cited
US3305773A
Cited
US3305774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-24 | 1973-05-26 | 1973-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-24 | 1977-05-26 | 1977-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-24 | 1981-05-26 | 1981-11-25 | $7700.00 | Window Closed / Lapsed |