Patent US1208272A successfully refreshed from Google Patents.
US2879490A
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US
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Rotary current transfer device
Assignee: Taylor Winfield Corp
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Filing: 1954-07-21
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Granted: 1959-03-24
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Expires: 1974-07-21
Abstract
No abstract record available.
Inventors
- 👤 Donald M Campbell
- 👤 Melvin M Seeloff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:47
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/36; B23K11/362; B23K11/366
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |