Patent US2661643A successfully refreshed from Google Patents.
US2661643A
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US
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Piston enlarging machine
Assignee: SPX Technologies Inc
•
Filing: 1948-12-20
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Granted: 1953-12-08
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Expires: 1968-12-20
Abstract
No abstract record available.
Inventors
- 👤 Holly M Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:06
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/10; B23P15/105; Y; Y10; Y10S; Y10S29/00; Y10S29/036; Y10T; Y10T29/00; Y10T29/47; Y10T29/49; Y10T29/49718; Y10T29/49748
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2149787A
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US2199474A
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US2265616A
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US2460657A
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US2501129A
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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) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |