US1608317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic valve
Assignee: Individual
•
Filing: 1925-05-26
•
Granted: 1926-11-23
•
Expires: 1945-05-26
Abstract
No abstract record available.
Inventors
- 👤 Hyde Augustus Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:13
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/02; H01J9/04; H01J9/042; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12063
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) | 1929-11-22 | 1930-05-24 | 1930-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1933-11-22 | 1934-05-24 | 1934-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1937-11-22 | 1938-05-24 | 1938-11-23 | $7700.00 | Window Closed / Lapsed |