Patent US2763294A successfully refreshed from Google Patents.
US2763294A
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Outlet for underfloor header duct
Assignee: National Electric Products Corp
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Filing: 1952-10-21
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Granted: 1956-09-18
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Expires: 1972-10-21
Abstract
No abstract record available.
Inventors
- 👤 Frank J Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:19
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/08; H02G3/18; E; E04; E04F; E04F19/00; E04F19/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1795062A
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US1969043A
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US1996371A
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US2041965A
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US2167597A
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US2297179A
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US2596236A
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US2632620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-18 | 1960-03-19 | 1960-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-18 | 1964-03-19 | 1964-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-18 | 1968-03-19 | 1968-09-18 | $7700.00 | Window Closed / Lapsed |