US3425545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating fibrous suspensions
Assignee: Individual
•
Filing: 1967-10-23
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Granted: 1969-02-04
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Expires: 1987-10-23
Abstract
No abstract record available.
Inventors
- 👤 Rudolf Zemanek
- 👤 Jan Janci
- 👤 Jan Fellegi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:22
CPC Classifications
B; B04; B04C; B04C5/00; B04C5/08; B04C5/081; D; D21; D21D; D21D5/00; D21D5/18; B04C5/12; B04C5/13; B04C2005/133
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) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |