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US2644026A
Expired / Lapsed
US
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Radioactive lightining protector with accelerating elements
Assignee: HELITA SOC
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Filing: 1951-04-10
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Granted: 1953-06-30
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Expires: 1971-04-10
Abstract
No abstract record available.
Inventors
- 👤 Grenier Joseph Pierre
- 👤 Lescieux Pierre Edouard Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:55
CPC Classifications
H; H02; H02G; H02G13/00; H02G13/20; H02G13/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2025338A
Cited
US2128408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-29 | 1956-12-29 | 1957-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-29 | 1960-12-29 | 1961-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-29 | 1964-12-29 | 1965-06-30 | $7700.00 | Window Closed / Lapsed |