US2465884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming propeller tip sections
Assignee: AO Smith Corp
•
Filing: 1944-01-22
•
Granted: 1949-03-29
•
Expires: 1964-01-22
Abstract
No abstract record available.
Inventors
- 👤 Ernst R Koppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:20
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/78; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49332; Y10T29/49789; Y10T29/49792
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1339970A
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US1577996A
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US1574563A
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GB207949A
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US1980834A
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US1854550A
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US1942222A
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US1982874A
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US2138127A
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US2151568A
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GB554449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-28 | 1952-09-27 | 1953-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-28 | 1956-09-27 | 1957-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-28 | 1960-09-27 | 1961-03-29 | $7700.00 | Window Closed / Lapsed |