US2661663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Punching method and tool
Assignee: Davenport Machine Tool Co Inc
•
Filing: 1948-03-30
•
Granted: 1953-12-08
•
Expires: 1968-03-30
Abstract
No abstract record available.
Inventors
- 👤 Earl W Brinkman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:01
CPC Classifications
B; B23; B23D; B23D3/00; B23D3/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49995; Y10T409/00; Y10T409/50; Y10T409/50082; Y10T409/501312
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1028824A
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US1233373A
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US1148065A
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US1482110A
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US1549309A
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US1695955A
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US2255948A
Cited
US2169460A
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US2393646A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-07 | 1957-06-08 | 1957-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-07 | 1961-06-08 | 1961-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-07 | 1965-06-08 | 1965-12-08 | $7700.00 | Window Closed / Lapsed |