US2373175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge apparatus
Assignee: AT&T Inc
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Filing: 1942-09-29
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Granted: 1945-04-10
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Expires: 1962-09-29
Abstract
No abstract record available.
Inventors
- 👤 Wallace A Depp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:19
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/38; H01J17/40; H01J17/44; H01J17/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-04-09 | 1948-10-09 | 1949-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-09 | 1952-10-09 | 1953-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-09 | 1956-10-09 | 1957-04-10 | $7700.00 | Window Closed / Lapsed |