Patent US2867681A successfully refreshed from Google Patents.
US2867681A
Expired / Lapsed
US
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Wiring duct
Assignee: Schneider Electric USA Inc
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Filing: 1955-02-18
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Granted: 1959-01-06
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Expires: 1975-02-18
Abstract
No abstract record available.
Inventors
- 👤 Huehnel Alwin Leopold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:25
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/04; H02G3/0437; H02G3/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2230423A
Cited
US1189208A
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US1094109A
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US1239223A
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US1574297A
Cited
US1986965A
Cited
US2592130A
Cited
GB685964A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-05 | 1962-07-07 | 1963-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-05 | 1966-07-07 | 1967-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-05 | 1970-07-07 | 1971-01-06 | $7700.00 | Window Closed / Lapsed |