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US2797344A
Expired / Lapsed
US
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De-icing apparatus for electric cables
Assignee: United States Steel Corp
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Filing: 1954-12-10
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Granted: 1957-06-25
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Expires: 1974-12-10
Abstract
No abstract record available.
Inventors
- 👤 Walter T Peirce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:08
CPC Classifications
H; H02; H02G; H02G7/00; H02G7/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2081803A
Cited
US2075073A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |