Patent US2851319A successfully refreshed from Google Patents.
US2851319A
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Piston and process of constructing same
Assignee: Roulements a Aiguilles SA
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Filing: 1953-05-29
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Granted: 1958-09-09
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Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 Pitner Alfred Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:44
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/16; B; B23; B23P; B23P11/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49249; Y10T29/49256; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32861; Y10T403/32877
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1410493A
Cited
US1404654A
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US1480185A
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US1722389A
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US1684862A
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US1909553A
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US2142017A
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US1997309A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |