Patent US2758713A successfully refreshed from Google Patents.
US2758713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hardinge
Assignee: —
•
Filing: —
•
Granted: 1956-08-14
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Expires: 1973-08-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:31
CPC Classifications
B; B07; B07B; B07B4/00; B07B4/02; B07B7/00; B07B7/08; B07B7/083
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
APPARATUS FOR CLASSIFYING COARSE AND FINE MATERIAL FROM A MIXED FLUID STREAM THEREOF AND COMPRISING AN IMPELLER HAVING A SHAFT, A PAIR OF TRANSVERSE MEMBERS FIXED TO AND SPACED LONGITUDINALLY OF SAID SHAFT, A PLURALITY OF FLUID IMPELLING VANES EXTENDING BETWEEN AND PERIPHERALLY SPACED AROUND AND FIXED TO SAID MEMBERS, AND A SUBSTANTIALLY IMPERFORATE SHIELD MEANS EXTENDING BETWEEN SAID MEMBERS AND ALSO BETWEEN SAID BLADES ADJACENT THE INNER EDGES THEREOF; MEANS SUPPORTING SAID IMPELLER FOR ROTATION ABOUT THE AXIS OF THE SHAFT THEREOF; AND A CASING
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) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |