Patent US3241038A successfully refreshed from Google Patents.
US3241038A
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Portable static inverter with reduced harmonic content in the output wave form
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1960-02-02
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Granted: 1966-03-15
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Expires: 1980-02-02
Abstract
No abstract record available.
Inventors
- 👤 Carmelo J Amato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:45
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/53; H02M7/537; H02M7/538; H02M7/53803; H02M7/53806
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A STATIC INVERTER COMPRISING MEANS FOR GENERATING A PAIR OF WAVE FORMS HAVING HALF WAVE SYMMETRY, MEANS FOR SHIFTING THE PHASE OF ONE WAVE FORM WITH RESPECT TO THE OTHER SUFFICIENTLY TO CAUSE A PHASE DISPLACEMENT OF 180*/N BETWEEN THE TWO WAVE FORMS, WHERE N IS THE NUMBER OF THE HARMONIC TO BE ELIMINATED, AND MEANS SEQUENTIALLY ENERGIZED BY THE TWO OUT PHASE WAVE FORMS TO PRODUCE THEREBY A COMPOSITE WAVE FORM DEVOID OF THE NTH HARMONIC.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |