US2810853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron discharge apparatus
Assignee: International Standard Electric Corp
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Filing: 1951-11-29
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Granted: 1957-10-22
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Expires: 1971-11-29
Abstract
No abstract record available.
Inventors
- 👤 Beck Arnold Hugh William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:59
CPC Classifications
H; H01; H01J; H01J23/00; H01J23/02; H01J23/06; H01J23/11; H03; H03F; H03F1/00; H03F1/26; H03F1/28; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/046; H04J; H04J3/00; H05; H05B; H05B33/00; H05B33/12; H05B33/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-21 | 1961-04-22 | 1961-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-21 | 1965-04-22 | 1965-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-21 | 1969-04-22 | 1969-10-22 | $7700.00 | Window Closed / Lapsed |