US2676295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for transforming a first direct voltage into a second direct voltage
Assignee: Hartford National Bank and Trust Co
•
Filing: 1951-06-30
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Granted: 1954-04-20
•
Expires: 1971-06-30
Abstract
No abstract record available.
Inventors
- 👤 Douma Tjiske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:19
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/02; H02M3/04; H02M3/10; H02M3/125; H02M3/13
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1752247A
Cited
US1919976A
Cited
US1919977A
Cited
US1959374A
Cited
US2267233A
Cited
US2555305A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-19 | 1957-10-19 | 1958-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-19 | 1961-10-19 | 1962-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-19 | 1965-10-19 | 1966-04-20 | $7700.00 | Window Closed / Lapsed |