Patent US2725542A successfully refreshed from Google Patents.
US2725542A
Expired / Lapsed
US
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Bus duct structure and plug-in unit having polarizing means
Assignee: Westinghouse Electric Corp
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Filing: 1953-07-20
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Granted: 1955-11-29
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Expires: 1973-07-20
Abstract
No abstract record available.
Inventors
- 👤 William F Born
- 👤 James B Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:08
CPC Classifications
H; H02; H02G; H02G5/00; H02G5/06; H02G5/08
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) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |