Patent US3020809A successfully refreshed from Google Patents.
US3020809A
Expired / Lapsed
US
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Apparatus for die cutting paperboard
Assignee: Waldorf Paper Products Co
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Filing: 1958-07-14
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Granted: 1962-02-13
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Expires: 1978-07-14
Abstract
No abstract record available.
Inventors
- 👤 Guyer Reynolds
- 👤 Nels H Sandberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:17
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/38; B26F1/44; B26F1/40; B26F2001/4463; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0581
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |