US2483457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode-ray tube
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1945-04-05
•
Granted: 1949-10-04
•
Expires: 1965-04-05
Abstract
No abstract record available.
Inventors
- 👤 Feldt Rudolf
- 👤 Lempert Irving Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:33
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2123636A
Cited
GB441693A
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US2131563A
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US2266773A
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US2297752A
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GB549278A
Cited
US2269115A
Cited
US2278478A
Cited
US2404046A
Cited
US2413276A
Cited
US2409514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-03 | 1953-04-04 | 1953-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-03 | 1957-04-04 | 1957-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-03 | 1961-04-04 | 1961-10-04 | $7700.00 | Window Closed / Lapsed |