Patent US2915665A successfully refreshed from Google Patents.
US2915665A
Expired / Lapsed
US
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Electric discharge tubes
Assignee: Centre National de la Recherche Scientifique
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Filing: 1957-07-03
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Granted: 1959-12-01
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Expires: 1977-07-03
Abstract
No abstract record available.
Inventors
- 👤 Vulmiere Jacques Claude
- 👤 Vulmiere Huguette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:39
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/35; H01S; H01S3/00; H01S3/02; H01S3/03
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |