US3422338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible current converter for selective direction of current flow through d.c. load and including choke coil with unidirectional current flow
Assignee: BBC Brown Boveri AG Germany
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Filing: 1966-09-16
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Granted: 1969-01-14
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Expires: 1986-09-16
Abstract
No abstract record available.
Inventors
- 👤 Reinhard Philipps
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:44
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/162
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999013A
Cited
US1939429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |