US2748453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making piston rings
Assignee: Motors Liquidation Co
•
Filing: 1951-05-25
•
Granted: 1956-06-05
•
Expires: 1971-05-25
Abstract
No abstract record available.
Inventors
- 👤 John M Haldeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:43
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/40; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/53; Y10T29/53904
Claims Analysis
Total Claims: 0
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US2379627A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-06-05 | 1959-12-05 | 1960-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-05 | 1963-12-05 | 1964-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-05 | 1967-12-05 | 1968-06-05 | $7700.00 | Window Closed / Lapsed |