Patent US2653561A successfully refreshed from Google Patents.
US2653561A
Expired / Lapsed
US
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Metalworking machine
Assignee: United Aircraft Products Inc
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Filing: 1949-06-20
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Granted: 1953-09-29
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Expires: 1969-06-20
Abstract
No abstract record available.
Inventors
- 👤 Stiefelmayer Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:05
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/14; B21D22/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US65035A
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US344459A
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US460550A
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US816694A
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US1497001A
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US1903592A
Cited
US1953924A
Cited
US1994034A
Cited
US2097356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-28 | 1957-03-30 | 1957-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-28 | 1961-03-30 | 1961-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-28 | 1965-03-30 | 1965-09-29 | $7700.00 | Window Closed / Lapsed |