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Patent US2507047A successfully refreshed from Google Patents.
US2507047A
Expired / Lapsed
US
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Rivet feeding attachment
Assignee: Douglas Aircraft Co Inc
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Filing: 1944-05-02
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Granted: 1950-05-09
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Expires: 1964-05-02
Abstract
No abstract record available.
Inventors
- 👤 Oscar R Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:34
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US624279A
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US1499887A
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US1753499A
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US1921485A
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US1939632A
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US2056559A
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US2171029A
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US2304425A
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US2335670A
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US2330052A
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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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |