US2929174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for automatic lapping of piston rings
Assignee: Ramsey Corp
•
Filing: 1956-11-13
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Granted: 1960-03-22
•
Expires: 1976-11-13
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Aumiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:15
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/08; B24B19/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US550785A
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US2195056A
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US2422418A
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US2749672A
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US2679129A
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US2785512A
Cited
US2765529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-22 | 1963-09-21 | 1964-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-22 | 1967-09-21 | 1968-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-22 | 1971-09-21 | 1972-03-22 | $7700.00 | Window Closed / Lapsed |