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Patent US2486359A successfully refreshed from Google Patents.
US2486359A
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Piston ring
Assignee: SKF Automotive Products Inc
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Filing: 1945-09-27
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Granted: 1949-10-25
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Expires: 1965-09-27
Abstract
No abstract record available.
Inventors
- 👤 George C Mayfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:59
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/20; F16J9/203; F16J9/206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB189313592A
Cited
US2290499A
Cited
US2334243A
Cited
US2362287A
Cited
US2404140A
Cited
US2452503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |