US3530416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic element for stationary field clutches
Assignee: Dana Inc
•
Filing: 1968-12-13
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Granted: 1970-09-22
•
Expires: 1988-12-13
Abstract
No abstract record available.
Inventors
- 👤 Hubert E Klinkenberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:13
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/10; F16D27/108; F16D27/112; F16D2027/008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3130355A
Cited
US3325760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |