Patent US2752793A successfully refreshed from Google Patents.
US2374810A
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Electron discharge apparatus
Assignee: International Standard Electric Corp
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Filing: 1940-11-27
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Granted: 1945-05-01
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Expires: 1960-11-27
Abstract
No abstract record available.
Inventors
- 👤 Fremlin John Heaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:01
CPC Classifications
A; A01; A01C; A01C17/00; A63; A63H; A63H3/00; A63H3/006; H; H01; H01J; H01J25/00; H01J25/02; H01J25/06; H01J25/08; H01J25/10; H01J25/16; H03; H03L; H03L1/00; H03L1/02; H03L7/00; H03L7/02; H03L7/04
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) | 1948-04-30 | 1948-10-30 | 1949-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-04-30 | 1952-10-30 | 1953-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-04-30 | 1956-10-30 | 1957-05-01 | $7700.00 | Window Closed / Lapsed |