Patent US2558074A successfully refreshed from Google Patents.
US2558074A
Expired / Lapsed
US
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Interlocking mechanism for metal enclosed switchgears
Assignee: Westinghouse Electric Corp
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Filing: 1949-09-29
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Granted: 1951-06-26
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Expires: 1969-09-29
Abstract
No abstract record available.
Inventors
- 👤 Glen L Claybourn
- 👤 Jr Paul Kocsis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:03
CPC Classifications
H; H01; H01H; H01H33/00; H01H33/02; H01H33/46; H01H33/52; H02; H02B; H02B11/00; H02B11/12; H02B11/127; H02B11/133; H02B13/00; H02B13/02
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) | 1954-06-25 | 1954-12-25 | 1955-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-25 | 1958-12-25 | 1959-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-25 | 1962-12-25 | 1963-06-26 | $7700.00 | Window Closed / Lapsed |