US2693398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston ring assembly and support member
Assignee: Hastings Manufacturing Co
•
Filing: 1950-07-11
•
Granted: 1954-11-02
•
Expires: 1970-07-11
Abstract
No abstract record available.
Inventors
- 👤 Hugo F Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:06
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; F16J9/066; F16J9/067; F16J9/069; F16J9/12; F16J9/20; F16J9/203
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1350849A
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US757214A
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US2281873A
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US2212042A
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GB538285A
Cited
US2287707A
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US2274805A
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US2589154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |