Patent US3550491A successfully refreshed from Google Patents.
US3550491A
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US
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Punch and die assembly
Assignee: WILLIAM F WINGARD
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Filing: 1968-10-11
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Granted: 1970-12-29
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Expires: 1988-10-11
Abstract
No abstract record available.
Inventors
- 👤 William F Wingard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:56
CPC Classifications
B; B21; B21D; B21D28/00; B21D28/02; B21D28/14; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/0443; Y10T83/0448; Y10T83/0453; Y10T83/202; Y10T83/2092; Y10T83/2096; Y10T83/2122; Y10T83/929; Y10T83/9411; Y10T83/9423; Y10T83/9425; Y10T83/944; Y10T83/9449
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-28 | 1974-06-29 | 1974-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-28 | 1978-06-29 | 1978-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-28 | 1982-06-29 | 1982-12-29 | $7700.00 | Window Closed / Lapsed |