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Patent US2539641A successfully refreshed from Google Patents.
US2539641A
Expired / Lapsed
US
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Shielding device for transmission lines
Assignee: Ohio Brass Co
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Filing: 1947-03-14
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Granted: 1951-01-30
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Expires: 1967-03-14
Abstract
No abstract record available.
Inventors
- 👤 John M Sheadel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:29
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/42; H01B17/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1741333A
Cited
US1799977A
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US1802743A
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US1836999A
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US1695892A
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US1870781A
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US1813157A
Cited
GB391048A
Cited
US2095311A
Cited
US2232665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-29 | 1954-07-31 | 1955-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-29 | 1958-07-31 | 1959-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-29 | 1962-07-31 | 1963-01-30 | $7700.00 | Window Closed / Lapsed |