Patent US3514689A successfully refreshed from Google Patents.
US3514689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-phase ac-operated dc power supply
Assignee: RTX Corp
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Filing: 1968-08-21
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Granted: 1970-05-26
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Expires: 1988-08-21
Abstract
No abstract record available.
Inventors
- 👤 Ronald Giannamore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:27
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/08; H02M1/083; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/162; H02M7/1623; H02M7/1626
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3274482A
Cited
US3289071A
Cited
US3354375A
Cited
US3466525A
Cited
US3465234A
Cited
US3452265A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |