US2451292A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dark trace screen
Assignee: RCA Corp
•
Filing: 1943-12-20
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Granted: 1948-10-12
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Expires: 1963-12-20
Abstract
No abstract record available.
Inventors
- 👤 Humboldt W Leverenz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:30
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/14; C; C09; C09K; C09K9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1891827A
Cited
US1954691A
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US2163918A
Cited
GB492722A
Cited
US2330171A
Cited
US2233786A
Cited
US2338233A
Cited
US2303576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-10-12 | 1952-04-12 | 1952-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-10-12 | 1956-04-12 | 1956-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-10-12 | 1960-04-12 | 1960-10-12 | $7700.00 | Window Closed / Lapsed |