US2422431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making piston rings
Assignee: Hastings Manufacturing Co
•
Filing: 1944-02-28
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Granted: 1947-06-17
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Expires: 1964-02-28
Abstract
No abstract record available.
Inventors
- 👤 Adolph E Melrose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:16
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/18; B24C3/20; B24C3/22; Y; Y10; Y10S; Y10S29/00; Y10S29/036; Y10T; Y10T29/00; Y10T29/47; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49078; Y10T29/49229; Y10T29/49274; Y10T29/49275
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US955470A
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US1074675A
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US1116776A
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US1241836A
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US2248530A
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US2328869A
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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) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |