Patent US2660984A successfully refreshed from Google Patents.
US2660984A
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US
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Machine tool with liquid spring actuated ram
Assignee: WALES STRIPPIT CORP
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Filing: 1951-03-01
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Granted: 1953-12-01
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Expires: 1971-03-01
Abstract
No abstract record available.
Inventors
- 👤 Robert F Zumwalt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:34
CPC Classifications
B; B30; B30B; B30B1/00; B30B1/32; F; F16; F16F; F16F5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1268270A
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US1857624A
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US2346667A
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US2563194A
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US2574875A
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US2560005A
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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) | 1956-11-30 | 1957-06-01 | 1957-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-30 | 1961-06-01 | 1961-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-30 | 1965-06-01 | 1965-12-01 | $7700.00 | Window Closed / Lapsed |