Patent US2320860A successfully refreshed from Google Patents.
US2320860A
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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: 1943-06-01
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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
2026-10-23 19:18
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) | 1946-05-31 | 1946-11-30 | 1947-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-05-31 | 1950-11-30 | 1951-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-05-31 | 1954-11-30 | 1955-06-01 | $7700.00 | Window Closed / Lapsed |