US2743813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Materials separating means
Assignee: CHARLES EISENBERG
•
Filing: 1951-04-25
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Granted: 1956-05-01
•
Expires: 1971-04-25
Abstract
No abstract record available.
Inventors
- 👤 Lewis C Erickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:15
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/12; B07B1/14; B07B1/15; B07B1/155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF SEPARATING FINER MATERIAL FROM COARSER MATERIAL THROUGH THE USE OF A BED OF SPACED PARALLEL ROLLS OF ELLIPTICAL CROSS SECTION DRIVEN IN ONE DIRECTION WITH AN APPROXIMATELY 90* PHASE SEPARATION BETWEEN ADJACENT ROLLS, WHICH COMPRISES DRIVING SAID ROLLS WHILE MAINTAINING THE BED SO NEARLY HORIZONTAL THAT ROTATION OF THE ROLLS WILL NOT CLEAR THE BED OF PIECES RESTING BETWEEN THE ROLLS, AND LOADING THAT END OF THE BED AWAY
Claim 2
Independent Claim
72 words
THE METHOD OF SEPARATING FINER MATERIAL FROM COARSER MATERIAL THROUGH THE USE OF A BED OF SPACED PARALLEL ROLLS OF ELLIPTICAL CROSS SECTION DRIVEN IN ONE DIRECTION WITH AN APPROXIMATELY 90* PHASE SEPARATION BETWEEN ADJACENT ROLLS, WHICH COMPRISES DRIVING SAID ROLLS WHILE MAINTAINING THE BED SO NEARLY HORIZONTAL THAT ROTATION OF THE ROLLS WILL NOT CLEAR THE BED OF PIECES RESTING BETWEEN THE ROLLS, AND LOADING THAT END OF THE BED AWAY
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |