Patent US2498813A successfully refreshed from Google Patents.
US2498813A
Expired / Lapsed
US
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Machine for applying helical fins to cylindrical bodies by means including ironing tools
Assignee: BUENSOD STACEY Inc
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Filing: 1945-07-21
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Granted: 1950-02-28
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Expires: 1965-07-21
Abstract
No abstract record available.
Inventors
- 👤 Edward S Lea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:31
CPC Classifications
B; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B21C37/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1630912A
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US1909704A
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US2087723A
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US2151685A
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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) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |