US3395327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage direct current transmission system with condition responsive, tunable, harmonic filters
Assignee: Westinghouse Electric Corp
•
Filing: 1966-08-31
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Granted: 1968-07-30
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Expires: 1986-08-31
Abstract
No abstract record available.
Inventors
- 👤 Francis D Kaiser
- 👤 John C Rissinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:24
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/36; H02M; H02M1/00; H02M1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1319521A
Cited
US1174793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |