US2500566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of piston ring elements
Assignee: Hastings Manufacturing Co
•
Filing: 1944-05-11
•
Granted: 1950-03-14
•
Expires: 1964-05-11
Abstract
No abstract record available.
Inventors
- 👤 Harold P Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:41
CPC Classifications
B; B21; B21F; B21F37/00; B21F37/02; B23; B23P; B23P15/00; B23P15/06; C; C21; C21D; C21D9/00; C21D9/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1953-03-13 | 1953-09-12 | 1954-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-13 | 1957-09-12 | 1958-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-13 | 1961-09-12 | 1962-03-14 | $7700.00 | Window Closed / Lapsed |