Patent US3979349A successfully refreshed from Google Patents.
Patent US2711249A successfully refreshed from Google Patents.
US2711249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum magnet separator
Assignee: AG fur UNTERNEHMUNGEN DER EISEN- und STAHLINDUSTRIE
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Filing: 1954-05-20
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Granted: 1955-06-21
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Expires: 1974-05-20
Abstract
No abstract record available.
Inventors
- 👤 Errki A Laurila
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:12
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/10; B03C1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A MAGNETIC SEPARATOR FOR SEPARATING MAGNETIZABLE PARTICLES FROM UNMAGNETIZABLE PARTICLES COMPRISING A ROTATABLE DRUM CONSISTING OF A ROTATABLE DISC, A ROTATABLE ANNULAR COVER MEMBER MOUNTED COAXIALLY WITH SAID DISC IN SPACED RELATION THERETO, SAID DISC AND SAID COVER MEMBER BEING ARRANGED TO ROTATE INDEPENDENTLY OF EACH OTHER, SAID COVER MEMBER BEING CONSTRUCTED OF A DIELECTRIC MATERIAL, A PLURALITY OF POLE PIECES MOUNTED BETWEEN SAID DISC AND SAID COVER MEMBER, THE SPACE BETWEEN SAID DISC AND COVER MEMBER BEING ANNULARLY UNIFORM AND HAVING A PREDETERMINED MINUMUM WIDTH.
Claim 2
Dependent Claim
86 words
A MAGNETIC SEPARATOR FOR SEPARATING MAGNETIZABLE PARTICLES FROM UNMAGNETIZABLE PARTICLES COMPRISING A ROTATABLE DRUM CONSISTING OF A ROTATABLE DISC, A ROTATABLE ANNULAR COVER MEMBER MOUNTED COAXIALLY WITH SAID DISC IN SPACED RELATION THERETO, SAID DISC AND SAID COVER MEMBER BEING ARRANGED TO ROTATE INDEPENDENTLY OF EACH OTHER, SAID COVER MEMBER BEING CONSTRUCTED OF A DIELECTRIC MATERIAL, A PLURALITY OF POLE PIECES MOUNTED BETWEEN SAID DISC AND SAID COVER MEMBER, THE SPACE BETWEEN SAID DISC AND COVER MEMBER BEING ANNULARLY UNIFORM AND HAVING A PREDETERMINED MINUMUM WIDTH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-20 | 1958-12-20 | 1959-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-20 | 1962-12-20 | 1963-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-20 | 1966-12-20 | 1967-06-21 | $7700.00 | Window Closed / Lapsed |