Patent US3279602A successfully refreshed from Google Patents.
US3279602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic separation process and equipment therefor
Assignee: ET AL Inc
•
Filing: 1963-02-18
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Granted: 1966-10-18
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Expires: 1983-02-18
Abstract
No abstract record available.
Inventors
- 👤 James P Kottenstette
- 👤 Jr David C Card
- 👤 Lawrence E Jones
- 👤 Perry J Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:25
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
THE METHOD OF CONCENTRATING MORE MAGNETICALLY SUSCEPTIBLE METALLIC VALUES FROM A SUSPENSION OF SUCH VALUES WITH OTHER LESS MAGNETICALLY SUSCEPTIBLE MATERIALS IN A FLUID WHICH COMPRISES PASSING SAID SUSPENSION THROUGH A TUBULAR MEMBER HAVING AN ANNULAR ELECTRIC COIL MOUNTED AROUND THE OUTSIDE OF A PORTION OF SAID TUBULAR MEMBER IN CLOSE PROXIMITY THEREOT, SUBJECTING SUCH A SUSPENSION TO THE INFLUENCE OF A PULSED MAGNETIC FIELD PRODUCED BY POWERING SAID ELECTRIC COIL WITH AN ALTERNATING CURRENT TO MAXIMUM CURRENT DENSITY FOR A FRACTION OF ONE POLARITY SIDE OF A COMPLETE CYCLE AND THEN TURNING OFF THE POWER TO THE COIL UNTIL POWERED DURING A SIMILAR FRACTION OF EACH SUCCEEDING CYCLE TO SEGREGATE THE MORE MAGNETICALLY SUSCEPTIBLE VALUES IN A PREDETERMINED PORTION OF THE SUSPENSION, AND THEN COLLECTING A CONCENTRATE OF THE MORE MAGNETICALLY SUSCEPTIBLE METALLIC VALUES.
Claim 2
Independent Claim
135 words
THE METHOD OF CONCENTRATING MORE MAGNETICALLY SUSCEPTIBLE METALLIC VALUES FROM A SUSPENSION OF SUCH VALUES WITH OTHER LESS MAGNETICALLY SUSCEPTIBLE MATERIALS IN A FLUID WHICH COMPRISES PASSING SAID SUSPENSION THROUGH A TUBULAR MEMBER HAVING AN ANNULAR ELECTRIC COIL MOUNTED AROUND THE OUTSIDE OF A PORTION OF SAID TUBULAR MEMBER IN CLOSE PROXIMITY THEREOT, SUBJECTING SUCH A SUSPENSION TO THE INFLUENCE OF A PULSED MAGNETIC FIELD PRODUCED BY POWERING SAID ELECTRIC COIL WITH AN ALTERNATING CURRENT TO MAXIMUM CURRENT DENSITY FOR A FRACTION OF ONE POLARITY SIDE OF A COMPLETE CYCLE AND THEN TURNING OFF THE POWER TO THE COIL UNTIL POWERED DURING A SIMILAR FRACTION OF EACH SUCCEEDING CYCLE TO SEGREGATE THE MORE MAGNETICALLY SUSCEPTIBLE VALUES IN A PREDETERMINED PORTION OF THE SUSPENSION, AND THEN COLLECTING A CONCENTRATE OF THE MORE MAGNETICALLY SUSCEPTIBLE METALLIC VALUES.
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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) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |