Patent US2705293A successfully refreshed from Google Patents.
US2705293A
Expired / Lapsed
US
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Cathode spot excitation
Assignee: Individual
•
Filing: 1950-08-28
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Granted: 1955-03-29
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Expires: 1970-08-28
Abstract
No abstract record available.
Inventors
- 👤 John E White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:46
CPC Classifications
H; H01; H01J; H01J17/00; H01J17/50; H01J17/52; H01J17/54; H01J17/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1993811A
Cited
US1701356A
Cited
US1814759A
Cited
US2131204A
Cited
US2206008A
Cited
US2501089A
Cited
US2473550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-28 | 1958-09-27 | 1959-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-28 | 1962-09-27 | 1963-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-28 | 1966-09-27 | 1967-03-29 | $7700.00 | Window Closed / Lapsed |