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Patent US2656228A successfully refreshed from Google Patents.
US2656228A
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Piston packing ring
Assignee: Ramsey Corp
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Filing: 1951-02-12
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Granted: 1953-10-20
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Expires: 1971-02-12
Abstract
No abstract record available.
Inventors
- 👤 Melvin W Marien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:26
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/20; F16J9/203; F16J9/06; F16J9/061; F16J9/063; F16J9/064
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2068114A
Cited
US2197983A
Cited
US2250062A
Cited
US2297104A
Cited
US2237707A
Cited
US2285530A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |