US3130340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron gun for generating a hollow beam
Assignee: Tesla AS
•
Filing: 1960-10-05
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Granted: 1964-04-21
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Expires: 1980-10-05
Abstract
No abstract record available.
Inventors
- 👤 Koziak Roman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:35
CPC Classifications
H; H01; H01J; H01J3/00; H01J3/02; H01J3/029
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
AN ELECTRON GUN FOR GENERATING A HOLLOW BEAM OF ELECTRONS COMPRISING (A) A CATHODE HAVING A HOLLOW CENTRAL PORTION WITH A CONVEX OUTER SURFACE,
Claim 2
Dependent Claim
24 words
AN ELECTRON GUN FOR GENERATING A HOLLOW BEAM OF ELECTRONS COMPRISING (A) A CATHODE HAVING A HOLLOW CENTRAL PORTION WITH A CONVEX OUTER SURFACE,
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |