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US2420756A
Expired / Lapsed
US
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Method of making patterns
Assignee: Miller Engineering Corp
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Filing: 1942-08-14
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Granted: 1947-05-20
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Expires: 1962-08-14
Abstract
No abstract record available.
Inventors
- 👤 Raymond J Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:02
CPC Classifications
B; B22; B22C; B22C7/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US378634A
Cited
US1303097A
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US814263A
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US928714A
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US985154A
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US984461A
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US1335509A
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GB176300A
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US2070564A
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US2070945A
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US2206034A
Cited
US2348086A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-19 | 1950-11-18 | 1951-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-19 | 1954-11-18 | 1955-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-19 | 1958-11-18 | 1959-05-20 | $7700.00 | Window Closed / Lapsed |