Patent US3019683A successfully refreshed from Google Patents.
US3019683A
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US
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Resilient punching die accessory to guide, stop or eject material
Assignee: BIRKWEL RES AND DESIGN Inc
•
Filing: 1958-07-28
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Granted: 1962-02-06
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Expires: 1978-07-28
Abstract
No abstract record available.
Inventors
- 👤 Donald D Welbaum
- 👤 Robert M Birkenbeul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:33
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/04; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2135; Y10T83/566; Y10T83/5815; Y10T83/5842; Y10T83/727; Y10T83/741
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2488205A
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US2815076A
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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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |