Patent US2422325A successfully refreshed from Google Patents.
US2422325A
Expired / Lapsed
US
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Method of making patterns and forging dies
Assignee: Douglas Aircraft Co Inc
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Filing: 1943-07-31
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Granted: 1947-06-17
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Expires: 1963-07-31
Abstract
No abstract record available.
Inventors
- 👤 Orville A Wheelon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:24
CPC Classifications
B; B21; B21K; B21K5/00; B21K5/20; Y; Y10; Y10S; Y10S264/00; Y10S264/71; Y10S264/73
Claims Analysis
Total Claims: 0
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US2234994A
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US2325989A
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US2332360A
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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) | 1950-06-16 | 1950-12-16 | 1951-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-16 | 1954-12-16 | 1955-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-16 | 1958-12-16 | 1959-06-17 | $7700.00 | Window Closed / Lapsed |