US2848658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light responsive circuit
Assignee: Tung Sol Electric Inc
•
Filing: 1955-04-29
•
Granted: 1958-08-19
•
Expires: 1975-04-29
Abstract
No abstract record available.
Inventors
- 👤 Alex V Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:40
CPC Classifications
H; H01; H01J; H01J40/00; H01J40/02; H01J40/14; H01H; H01H47/00; H01H47/22; H01H47/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |