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US2649889A
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Assignee: Individual
•
Filing: 1948-03-30
•
Granted: 1953-08-25
•
Expires: 1968-03-30
Abstract
No abstract record available.
Inventors
- 👤 Frank E Dudley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:39
CPC Classifications
B; B21; B21D; B21D39/00; B21D39/08; B21D39/10; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53113; Y10T29/53122; Y10T29/53978; Y10T29/53987
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1680922A
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FR769073A
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US2373097A
Cited
US2298703A
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US2355852A
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US2488512A
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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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |