Patent US4340468A successfully refreshed from Google Patents.
US4340468A
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Method and apparatus for separating materials magnetically
Assignee: United States Department of Energy
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Filing: 1980-11-06
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Granted: 1982-07-20
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Expires: 2000-11-06
Abstract
Abstract Magnetic and non-magnetic materials are separated by passing stream thereof past coaxial current-carrying coils which produce a magnetic field wherein intensity varies sharply with distance radially of the axis of the coils.
Inventors
- 👤 Eugene C. Hise, Jr.
- 👤 Allen S. Holman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:24
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/26; B03C1/035
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
81 words
Apparatus for separating materials having different magnetic properties, comprising: a plurality of concentrically disposed, current-conducting coils each having a plurality of windings extending circumferentially about a central axis; means for passing a stream of said materials across ends of said coils in a direction substantially normal to said axis; and means for separately collecting portions of said materials that travel along different paths while crossing the ends of said coils under the influence of the magnetic field produced by said coils.
Claim 2
Dependent Claim
81 words
Apparatus for separating materials having different magnetic properties, comprising: a plurality of concentrically disposed, current-conducting coils each having a plurality of windings extending circumferentially about a central axis; means for passing a stream of said materials across ends of said coils in a direction substantially normal to said axis; and means for separately collecting portions of said materials that travel along different paths while crossing the ends of said coils under the influence of the magnetic field produced by said coils.
Claim 3
Independent Claim
79 words
A method for separating materials having different magnetic properties employing a plurality of concentrically disposed, current-conducting coils each having a plurality of windings extending circumferentially about a central axis, comprising; passing a stream of said materials across ends of said coils in a direction substantially normal to said axis; and separately collecting portions of said materials that travel along different paths while crossing the ends of said coils under the influence of the magnetic field produced by said coils.
Claim 4
Independent Claim
79 words
A method for separating materials having different magnetic properties employing a plurality of concentrically disposed, current-conducting coils each having a plurality of windings extending circumferentially about a central axis, comprising; passing a stream of said materials across ends of said coils in a direction substantially normal to said axis; and separately collecting portions of said materials that travel along different paths while crossing the ends of said coils under the influence of the magnetic field produced by said coils.
References Cited (Backward Citations)
US2652925A
Cited
US2604207A
Cited
US3279602A
Cited
US3608718A
Cited
US4042492A
Cited
SU655432A1
Cited
US4239619A
Cited
US4212651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |