US1445206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermionic rectifier and circuits therefor
Assignee: Individual
•
Filing: 1921-07-08
•
Granted: 1923-02-13
•
Expires: 1941-07-08
Abstract
No abstract record available.
Inventors
- 👤 James K Elderkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:20
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/06; H02H; H02H7/00; H02H7/10; H02H7/12; H02H7/1209
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) | 1926-02-12 | 1926-08-14 | 1927-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1930-02-12 | 1930-08-14 | 1931-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1934-02-12 | 1934-08-14 | 1935-02-13 | $7700.00 | Window Closed / Lapsed |