US2891671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter drum for recovering fibers from liquid
Assignee: Individual
•
Filing: 1956-04-20
•
Granted: 1959-06-23
•
Expires: 1976-04-20
Abstract
No abstract record available.
Inventors
- 👤 Nilsson Ivar Linus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:00
CPC Classifications
C; C09; C09B; C09B63/00; B; B01; B01D; B01D33/00; B01D33/06; B01D33/11; B01D33/44; B01D33/46; B01D33/463; B01D33/70; B01D33/72; D; D21; D21F; D21F1/00; D21F1/66; B01D2201/00; B01D2201/28; B01D2201/282
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2765915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-22 | 1962-12-22 | 1963-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-22 | 1966-12-22 | 1967-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-22 | 1970-12-22 | 1971-06-23 | $7700.00 | Window Closed / Lapsed |