Patent US3418725A successfully refreshed from Google Patents.
US3418725A
Expired / Lapsed
US
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Method and apparatus for mechanical aeration of stacks of cardboard, paper or other sheet material
Assignee: Individual
•
Filing: 1967-05-26
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Granted: 1968-12-31
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Expires: 1987-05-26
Abstract
No abstract record available.
Inventors
- 👤 Ruud Gunnar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:20
CPC Classifications
F; F26; F26B; F26B25/00; F26B25/001; F26B25/003; F26B25/004; B; B41; B41F; B41F23/00; B65; B65H; B65H31/00; B65H31/34; B65H31/40; F26B11/00; F26B11/22; B65H2701/00; B65H2701/10; B65H2701/17; B65H2701/176
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1090473A
Cited
US3239944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |