Patent US2878537A successfully refreshed from Google Patents.
US2878537A
Expired / Lapsed
US
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Method and apparatus for casting
Assignee: Individual
•
Filing: 1956-04-23
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Granted: 1959-03-24
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Expires: 1976-04-23
Abstract
No abstract record available.
Inventors
- 👤 Helen E Brennan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:41
CPC Classifications
B; B22; B22D; B22D11/00; B22D11/06; B22D11/0602
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US441643A
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US443536A
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US910674A
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US1249101A
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US1342127A
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US1612737A
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US1651678A
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US2393213A
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US2362875A
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US2714235A
Cited
US2664605A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |