Patent US2708087A successfully refreshed from Google Patents.
US2708087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centerpoise transformer rack
Assignee: Individual
•
Filing: 1951-10-19
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Granted: 1955-05-10
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Expires: 1971-10-19
Abstract
No abstract record available.
Inventors
- 👤 Lloyd B Blackstone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:56
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US503216A
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US532748A
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US740005A
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US1397843A
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DE376969C
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US1770564A
Cited
GB368561A
Cited
US1864651A
Cited
US1992322A
Cited
US2270375A
Cited
US2628805A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-09 | 1958-11-08 | 1959-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-09 | 1962-11-08 | 1963-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-09 | 1966-11-08 | 1967-05-10 | $7700.00 | Window Closed / Lapsed |