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Patent US2430557A successfully refreshed from Google Patents.
US2430557A
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US
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Bus bar duct system
Assignee: Trumbull Electric Manufacturing Co
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Filing: 1943-05-24
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Granted: 1947-11-11
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Expires: 1963-05-24
Abstract
No abstract record available.
Inventors
- 👤 Elmer T Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:07
CPC Classifications
H; H02; H02G; H02G5/00; H02G5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1840887A
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GB382795A
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US2261857A
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US2306353A
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US2317710A
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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) | 1950-11-10 | 1951-05-12 | 1951-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-10 | 1955-05-12 | 1955-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-10 | 1959-05-12 | 1959-11-11 | $7700.00 | Window Closed / Lapsed |