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Patent US2598567A successfully refreshed from Google Patents.
US2598567A
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Heating device for electric discharge tubes
Assignee: Claude Paz et Visseaux SA
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Filing: 1949-01-11
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Granted: 1952-05-27
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Expires: 1969-01-11
Abstract
No abstract record available.
Inventors
- 👤 Lemaigre-Voreaux Pierre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:52
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/52; F; F21; F21V; F21V23/00; F21V23/02; A; A63; A63F; A63F2250/00; A63F2250/08; F21Y; F21Y2103/00
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) | 1955-05-27 | 1955-11-26 | 1956-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-27 | 1959-11-26 | 1960-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-27 | 1963-11-26 | 1964-05-27 | $7700.00 | Window Closed / Lapsed |