Patent US1786154A successfully refreshed from Google Patents.
US1786154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiotube
Assignee: Individual
•
Filing: 1929-06-27
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Granted: 1930-12-23
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Expires: 1949-06-27
Abstract
No abstract record available.
Inventors
- 👤 Wilbur B Driver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:16
CPC Classifications
H; H01; H01J; H01J19/00; H01J19/28; H01J19/38; H01J2893/00; H01J2893/0001; H01J2893/0012; H01J2893/0015; H01J2893/0016
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1933-12-22 | 1934-06-23 | 1934-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-12-22 | 1938-06-23 | 1938-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-12-22 | 1942-06-23 | 1942-12-23 | $7700.00 | Window Closed / Lapsed |