US1659636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device fob amplifying voltage and cubeent
Assignee: —
•
Filing: —
•
Granted: 1928-02-21
•
Expires: 1945-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:42
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/04; Y; Y10; Y10S; Y10S313/00; Y10S313/07
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) | 1931-02-20 | 1931-08-22 | 1932-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-02-20 | 1935-08-22 | 1936-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-02-20 | 1939-08-22 | 1940-02-21 | $7700.00 | Window Closed / Lapsed |