US2695442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing electric discharge tubes
Assignee: Hartford National Bank and Trust Co
•
Filing: 1948-08-03
•
Granted: 1954-11-30
•
Expires: 1968-08-03
Abstract
No abstract record available.
Inventors
- 👤 Klopping Carel Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2212556A
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US2244358A
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US2310811A
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US2399005A
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US2428610A
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US2445993A
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US2414137A
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US2402119A
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US2521364A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-29 | 1958-05-31 | 1958-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-29 | 1962-05-31 | 1962-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-29 | 1966-05-31 | 1966-11-30 | $7700.00 | Window Closed / Lapsed |