US2682007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact type electrical discharge device
Assignee: Hanovia Chemical and Manufacturing Co
•
Filing: 1951-01-11
•
Granted: 1954-06-22
•
Expires: 1971-01-11
Abstract
No abstract record available.
Inventors
- 👤 David L Hilder
- 👤 Revere H Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:11
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/04; H01J61/06; H01J61/073; H01J61/0732
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2249094A
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GB491176A
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US2217438A
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US2404953A
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US2504581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |