US3328233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of asbestos ore
Assignee: American Smelting and Refining Co
•
Filing: 1964-07-31
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Granted: 1967-06-27
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Expires: 1984-07-31
Abstract
No abstract record available.
Inventors
- 👤 Martinez Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:25
CPC Classifications
B; B03; B03C; B03C1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF TREATING A MIXTURE OF MAGNETITE CONTENSITY PREDETERMINED TO BE SUFFICIENT TO PROVIDE AN EFCOMPRISES INTRODUCING SAID MIXTURE INTO A MAGNETIC FIELD TAINING ASBESTOS FIBER BEARING SERPENTINE ORE PARTICLES, SAID ASBESTOS FIBER BEING EMBEDDED THEREIN, AND MAGNETITE CONTAINING NON-FIBER BEARING SEPENTINE OR PARTICLES WHICH IN A GASEOUS MEDIUM, SAID MAGNETIC FIELD HAVING AN INFECTIVE MAGNETIC RESPONSE IN SAID FIBER BEARING ORE PARTICLES AND SEPARATING FROM THE PARTICLES IN SAID FIELD A MIXTURE OF PARTICLES HAVING AN ASBESTOS FIBER CONTENT WHICH IS RICHER THAN THAT OF THE MIXTURE INTRODUCED INTO SAID MAGNETIC FIELD.
Claim 2
Independent Claim
94 words
A METHOD OF TREATING A MIXTURE OF MAGNETITE CONTENSITY PREDETERMINED TO BE SUFFICIENT TO PROVIDE AN EFCOMPRISES INTRODUCING SAID MIXTURE INTO A MAGNETIC FIELD TAINING ASBESTOS FIBER BEARING SERPENTINE ORE PARTICLES, SAID ASBESTOS FIBER BEING EMBEDDED THEREIN, AND MAGNETITE CONTAINING NON-FIBER BEARING SEPENTINE OR PARTICLES WHICH IN A GASEOUS MEDIUM, SAID MAGNETIC FIELD HAVING AN INFECTIVE MAGNETIC RESPONSE IN SAID FIBER BEARING ORE PARTICLES AND SEPARATING FROM THE PARTICLES IN SAID FIELD A MIXTURE OF PARTICLES HAVING AN ASBESTOS FIBER CONTENT WHICH IS RICHER THAN THAT OF THE MIXTURE INTRODUCED INTO SAID MAGNETIC FIELD.
References Cited (Backward Citations)
US1797597A
Cited
GB423684A
Cited
US2500154A
Cited
US2662639A
Cited
US2690263A
Cited
US2939580A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-06-26 | 1970-12-26 | 1971-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-06-26 | 1974-12-26 | 1975-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-06-26 | 1978-12-26 | 1979-06-27 | $7700.00 | Window Closed / Lapsed |