US2506660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the regulation and centering under vacuum of a filament for a wehnelt cathode
Assignee: Thales SA
•
Filing: 1947-05-16
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Granted: 1950-05-09
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Expires: 1967-05-16
Abstract
No abstract record available.
Inventors
- 👤 Blattmann Henri
- 👤 Bruck Henri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:49
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/08; H01J37/00; H01J37/02; H01J37/04; H01J37/06; H01J37/067
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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |