Patent US2495474A successfully refreshed from Google Patents.
US2495474A
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Apparatus for induction heating rotatably mounted piston rings
Assignee: Hastings Manufacturing Co
•
Filing: 1945-04-05
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Granted: 1950-01-24
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Expires: 1965-04-05
Abstract
No abstract record available.
Inventors
- 👤 Harold P Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:02
CPC Classifications
C; C21; C21D; C21D9/00; C21D9/40; Y; Y10; Y10T; Y10T279/00; Y10T279/19; Y10T279/1926; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274
Claims Analysis
Total Claims: 0
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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) | 1953-01-23 | 1953-07-25 | 1954-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-23 | 1957-07-25 | 1958-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-23 | 1961-07-25 | 1962-01-24 | $7700.00 | Window Closed / Lapsed |