US2655614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron tube
Assignee: Machlett Laboratories Inc
•
Filing: 1950-05-25
•
Granted: 1953-10-13
•
Expires: 1970-05-25
Abstract
No abstract record available.
Inventors
- 👤 Howard D Doolittle
- 👤 William A Zarth
- 👤 Raymond H Rheaume
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:59
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J21/06; H01J21/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2200954A
Cited
US2509906A
Cited
US2400753A
Cited
US2446017A
Cited
US2452061A
Cited
US2455846A
Cited
US2461303A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-12 | 1957-04-13 | 1957-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-12 | 1961-04-13 | 1961-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-12 | 1965-04-13 | 1965-10-13 | $7700.00 | Window Closed / Lapsed |