Patent US2925847A successfully refreshed from Google Patents.
US2925847A
Expired / Lapsed
US
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Machine for forming piston rings from strip stock
Assignee: SPX Technologies Inc
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Filing: 1957-09-19
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Granted: 1960-02-23
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Expires: 1977-09-19
Abstract
No abstract record available.
Inventors
- 👤 Leo C Burns
- 👤 Vern H Bathrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:59
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/06; B23P15/065; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49274; Y10T29/49279; Y10T29/51; Y10T29/5197; Y10T83/00; Y10T83/444; Y10T83/4564; Y10T83/4567; Y10T83/4572; Y10T83/647; Y10T83/6476; Y10T83/6484; Y10T83/658; Y10T83/869; Y10T83/8737
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) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |