US2494018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blanking and piercing device
Assignee: Douglas Aircraft Co Inc
•
Filing: 1944-01-08
•
Granted: 1950-01-10
•
Expires: 1964-01-08
Abstract
No abstract record available.
Inventors
- 👤 Archibald M Urquhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:55
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/24; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2066; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/215; Y10T83/2155; Y10T83/2157; Y10T83/2163; Y10T83/222
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US928256A
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FR640303A
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US1683501A
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US1834918A
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US1890715A
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US1990932A
Cited
US1959602A
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US2111156A
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US2202809A
Cited
US2201582A
Cited
US2338982A
Cited
US2364574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-09 | 1953-07-11 | 1954-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-09 | 1957-07-11 | 1958-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-09 | 1961-07-11 | 1962-01-10 | $7700.00 | Window Closed / Lapsed |