Patent US2484288A successfully refreshed from Google Patents.
US2484288A
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Steel piston ring
Assignee: Muskegon Piston Ring Co
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Filing: 1947-12-22
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Granted: 1949-10-11
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Expires: 1967-12-22
Abstract
No abstract record available.
Inventors
- 👤 Douglas W Hamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:26
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/20; F16J9/206; F16J9/06; F16J9/061; F16J9/063; F16J9/203; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T428/00; Y10T428/12; Y10T428/12201; Y10T428/12215; Y10T428/12229; Y10T428/12264; Y10T428/12354
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1734356A
Cited
US1783886A
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US2267367A
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US2267369A
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US2272632A
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US2409966A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-10-10 | 1953-04-11 | 1953-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-10 | 1957-04-11 | 1957-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-10 | 1961-04-11 | 1961-10-11 | $7700.00 | Window Closed / Lapsed |