US2761749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil control ring
Assignee: Ramsey Corp
•
Filing: 1954-05-17
•
Granted: 1956-09-04
•
Expires: 1974-05-17
Abstract
No abstract record available.
Inventors
- 👤 Melvin W Marien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:37
CPC Classifications
F; F16; F16J; F16J9/00; F16J9/06; F16J9/064; F16J9/066; F16J9/067; F16J9/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1707035A
Cited
US1802573A
Cited
US1869108A
Cited
US2343942A
Cited
US2361904A
Cited
US2460431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-09-04 | 1960-03-05 | 1960-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-04 | 1964-03-05 | 1964-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-04 | 1968-03-05 | 1968-09-04 | $7700.00 | Window Closed / Lapsed |