US2767239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical raceway with reduced inside friction
Assignee: National Electric Products Corp
•
Filing: 1953-04-29
•
Granted: 1956-10-16
•
Expires: 1973-04-29
Abstract
No abstract record available.
Inventors
- 👤 Frank J Kennedy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:42
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/04; H02G3/0462; H02G3/0481; H02G3/08; H02G3/12; H02G3/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US817086A
Cited
US1804991A
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US2441945A
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US2392346A
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US2394500A
Cited
US2369629A
Cited
US2597706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |