US2657440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal casting apparatus
Assignee: Perfect Circle Corp
•
Filing: 1949-05-13
•
Granted: 1953-11-03
•
Expires: 1969-05-13
Abstract
No abstract record available.
Inventors
- 👤 Robert C Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:30
CPC Classifications
B; B22; B22D; B22D13/00; B22D13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2074537A
Cited
US1386269A
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US1624354A
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US706841A
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US1620829A
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US1704342A
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US1620831A
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US1704100A
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US1817209A
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US1810183A
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US1783094A
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US1758883A
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US1765022A
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US1960366A
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US1977220A
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US1971376A
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US1992739A
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US2066229A
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US2043956A
Cited
US2088547A
Cited
US2142097A
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US2266972A
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US2278555A
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US2399606A
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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) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |