US3518484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow cathode discharge device with control electrode for electron beam focusing
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1966-12-28
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Granted: 1970-06-30
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Expires: 1986-12-28
Abstract
No abstract record available.
Inventors
- 👤 Clifford William Alfre Maskell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:47
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/025; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J17/38; H01J17/40; H01J17/44; H01J37/00; H01J37/02; H01J37/04; H01J37/06; H01J37/077; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066; H01J2893/0068
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) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |