US2670255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston packing ring
Assignee: Individual
•
Filing: 1950-06-21
•
Granted: 1954-02-23
•
Expires: 1970-06-21
Abstract
No abstract record available.
Inventors
- 👤 Bergeron Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:24
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14; F16J9/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1251630A
Cited
US1344342A
Cited
US1413409A
Cited
FR567496A
Cited
US1781183A
Cited
US1828209A
Cited
US1822101A
Cited
US2060335A
Cited
US2387855A
Cited
US2425649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |