Patent US3401272A successfully refreshed from Google Patents.
US3401272A
Expired / Lapsed
US
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Ferroresonant transient suppression system
Assignee: Westinghouse Electric Corp
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Filing: 1965-08-30
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Granted: 1968-09-10
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Expires: 1985-08-30
Abstract
No abstract record available.
Inventors
- 👤 Rosa John
- 👤 Bryant Michael
- 👤 Jr Andrew S Sweetana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:14
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/45; H03K3/49; H02; H02H; H02H9/00; H02H9/005; H02H9/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |