US2725964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction clutches
Assignee: Ringspann GmbH
•
Filing: 1951-05-10
•
Granted: 1955-12-06
•
Expires: 1971-05-10
Abstract
No abstract record available.
Inventors
- 👤 Maurer Albrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:13
CPC Classifications
F; F16; F16D; F16D13/00; F16D13/58; F16D13/583
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US748569A
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US1157789A
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US2117482A
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US2217529A
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US2229319A
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US2380677A
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US2257912A
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US2399886A
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US2639013A
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US2508558A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-05 | 1959-06-06 | 1959-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-05 | 1963-06-06 | 1963-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-05 | 1967-06-06 | 1967-12-06 | $7700.00 | Window Closed / Lapsed |