US2570139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray image presentation system
Assignee: General Electric Co
•
Filing: 1946-01-18
•
Granted: 1951-10-02
•
Expires: 1966-01-18
Abstract
No abstract record available.
Inventors
- 👤 Donald E Maxwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:57
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/28
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1936796A
Cited
US2130032A
Cited
US2189457A
Cited
US2203750A
Cited
US2243234A
Cited
US2356510A
Cited
US2282895A
Cited
US2420516A
Cited
US2435207A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |