US2620245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple section piston ring
Assignee: Individual
•
Filing: 1950-05-20
•
Granted: 1952-12-02
•
Expires: 1970-05-20
Abstract
No abstract record available.
Inventors
- 👤 Arleigh R Moore
- 👤 Donald R Minser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:22
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/12; F16J9/14; F16J9/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
FR485000A
Cited
US1419781A
Cited
US1413409A
Cited
US1720128A
Cited
GB362138A
Cited
GB397782A
Cited
US2055153A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |