US2508979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical discharge device
Assignee: Philips Laboratories Inc
•
Filing: 1946-06-19
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Granted: 1950-05-23
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Expires: 1966-06-19
Abstract
No abstract record available.
Inventors
- 👤 Karel M Van Gessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:59
CPC Classifications
H; H01; H01Q; H01Q13/00; H01Q13/10; H01Q13/18; C; C03; C03B; C03B33/00; C03B33/08; H01J; H01J5/00; H01J5/46; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854; Y10T428/12861; Y10T428/12903; Y10T428/12917; Y10T428/12951; Y10T428/12958; Y10T428/12965
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US386099A
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US1575994A
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US1716912A
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US2030187A
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US2024585A
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US2154293A
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US2318653A
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US2339402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-22 | 1953-11-21 | 1954-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-22 | 1957-11-21 | 1958-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-22 | 1961-11-21 | 1962-05-23 | $7700.00 | Window Closed / Lapsed |