US2873154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston packing rings and method of producing same
Assignee: Individual
•
Filing: 1954-01-04
•
Granted: 1959-02-10
•
Expires: 1974-01-04
Abstract
No abstract record available.
Inventors
- 👤 Harold F Marker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:24
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/26; B; B23; B23P; B23P15/00; B23P15/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
BE502264A
Cited
FR840101A
Cited
US2330635A
Cited
US2313395A
Cited
GB568161A
Cited
US2487587A
Cited
US2702785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-02-09 | 1962-08-11 | 1963-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-09 | 1966-08-11 | 1967-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-09 | 1970-08-11 | 1971-02-10 | $7700.00 | Window Closed / Lapsed |