US2436227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming piston ring elements of ribbon steel
Assignee: Hastings Manufacturing Co
•
Filing: 1944-06-16
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Granted: 1948-02-17
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Expires: 1964-06-16
Abstract
No abstract record available.
Inventors
- 👤 Harold P Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:02
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/08; C; C25; C25D; C25D7/00; C25D7/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49281
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1772074A
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US1600961A
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US1794973A
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US2129868A
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US2349372A
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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) | 1951-02-16 | 1951-08-18 | 1952-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-16 | 1955-08-18 | 1956-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-16 | 1959-08-18 | 1960-02-17 | $7700.00 | Window Closed / Lapsed |