Patent US4828063A successfully refreshed from Google Patents.
US3544949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip ring device
Assignee: VLADIMIR VASILIEVICH RYNZANTSE
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Filing: 1967-10-12
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Granted: 1970-12-01
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Expires: 1987-10-12
Abstract
No abstract record available.
Inventors
- 👤 Lev Emelianovich Panasjuk
- 👤 Arnold Karlovich Kupits
- 👤 Evgeny Mikhailovich Romanov
- 👤 Veniamin Dmitrievich Ageev
- 👤 Vladimir Vasilievic Rynzantsev
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:59
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/64
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2179693A
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US2820207A
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US3058082A
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US2937224A
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US2981916A
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US3400357A
Cited
US3408610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-30 | 1974-06-01 | 1974-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-30 | 1978-06-01 | 1978-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-30 | 1982-06-01 | 1982-12-01 | $7700.00 | Window Closed / Lapsed |