US2981916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip ring assembly having a plurality of metal based slip rings
Assignee: Electro Tec Corp
•
Filing: 1958-06-09
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Granted: 1961-04-25
•
Expires: 1978-06-09
Abstract
No abstract record available.
Inventors
- 👤 Thomas M J O'brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:48
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1936469A
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US2376370A
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US2490329A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |