Patent US2727801A successfully refreshed from Google Patents.
Patent US2517815A successfully refreshed from Google Patents.
US2517815A
Expired / Lapsed
US
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Refractory mold composition
Assignee: Individual
•
Filing: 1947-06-23
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Granted: 1950-08-08
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Expires: 1967-06-23
Abstract
No abstract record available.
Inventors
- 👤 Weston Bonheur Massena
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:33
CPC Classifications
B; B22; B22C; B22C1/00; B22C1/16; B22C1/20; B22C1/22; B22C1/2206
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US553688A
Cited
US1285081A
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US1561956A
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US1778329A
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US2047297A
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US2029288A
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US2131205A
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US2086968A
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US2201321A
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US2274618A
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US2328622A
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US2409437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |