Patent US2808917A successfully refreshed from Google Patents.
US2808917A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic friction device
Assignee: Dana Inc
•
Filing: 1954-03-01
•
Granted: 1957-10-08
•
Expires: 1974-03-01
Abstract
No abstract record available.
Inventors
- 👤 Paul A Harter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:24
CPC Classifications
F; F16; F16D; F16D27/00; F16D27/02; F16D27/04; F16D27/06; F16D48/00; F16D48/06; F16D48/064; F16D2027/002; F16D2500/00; F16D2500/10; F16D2500/102; F16D2500/1021; F16D2500/1022; F16D2500/104; F16D2500/10443; F16D2500/1045; F16D2500/50; F16D2500/502; F16D2500/5023; F16D2500/50233; F16D2500/50245; F16D2500/50266; F16D2500/50275; F16D2500/70; F16D2500/704; F16D2500/70402; F16D2500/7042
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2290406A
Cited
US2395772A
Cited
US2427751A
Cited
US2600667A
Cited
US2703164A
Cited
US2675507A
Cited
US2718951A
Cited
US2664782A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |