Patent US651684A successfully refreshed from Google Patents.
US2655840A
Expired / Lapsed
US
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Apparatus for defibrating waste paper
Assignee: Individual
•
Filing: 1950-03-22
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Granted: 1953-10-20
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Expires: 1970-03-22
Abstract
No abstract record available.
Inventors
- 👤 Skardal Karl Arvid
- 👤 Borjeson Olov Birger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:54
CPC Classifications
D; D21; D21D; D21D1/00; D21D1/20; D21D1/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US357686A
Cited
US1431422A
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US1951684A
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US2265936A
Cited
US2289612A
Cited
US2351728A
Cited
US2424726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |