Patent US3399142A successfully refreshed from Google Patents.
US3399142A
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Magnetic materials and methods of making the same
Assignee: Georgia Kaolin Co
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Filing: 1963-10-02
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Granted: 1968-08-27
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Expires: 1983-10-02
Abstract
No abstract record available.
Inventors
- 👤 Robert F Conley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/68; G11B5/70; G11B5/706; G11B5/70626; G11B5/70642; G11B5/70652
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A PROCESS FOR PRODUCING A MAGNETIC PIGMENT OF SUPERIOR DISPERSING PROPERTIES AND MAGNETIC CHARACTERISTICS COMPRISING THE STEPS OF SUSPENDING A NONMAGNETIC OXIDE OF IRON IN AQUEOUS SLURRY, ADDING TO THE SLURRY A SOLUTION OF A SOLUBLE SOAP, ADDING TO THE SLURRY CONTAINING THE SOAP A SOLUBLE SALT OF AN ALKALINE EARTH METAL TO FORM AN INSOLUBLE SOAP, PRECIPITATING THE INSOLUBLE SOAP FORMED BY THE ADDITION OF THE ALKALINE EARTH METAL SALT, FILTERING, DRYING AND HEATING TO A TEMPERATURE SUFFICIENT TO INITIATE A GAS EVOLVING REACTION IN THE MASS, PERMITTING THE REACTION TO CONTINUE UNTIL COMPLETION IN AIR AND RECOVERING THE REACTED PRECIPITANT AS A MAGNETIC PIGMENT.
Claim 2
Dependent Claim
106 words
A PROCESS FOR PRODUCING A MAGNETIC PIGMENT OF SUPERIOR DISPERSING PROPERTIES AND MAGNETIC CHARACTERISTICS COMPRISING THE STEPS OF SUSPENDING A NONMAGNETIC OXIDE OF IRON IN AQUEOUS SLURRY, ADDING TO THE SLURRY A SOLUTION OF A SOLUBLE SOAP, ADDING TO THE SLURRY CONTAINING THE SOAP A SOLUBLE SALT OF AN ALKALINE EARTH METAL TO FORM AN INSOLUBLE SOAP, PRECIPITATING THE INSOLUBLE SOAP FORMED BY THE ADDITION OF THE ALKALINE EARTH METAL SALT, FILTERING, DRYING AND HEATING TO A TEMPERATURE SUFFICIENT TO INITIATE A GAS EVOLVING REACTION IN THE MASS, PERMITTING THE REACTION TO CONTINUE UNTIL COMPLETION IN AIR AND RECOVERING THE REACTED PRECIPITANT AS A MAGNETIC PIGMENT.
References Cited (Backward Citations)
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US2623849A
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US2689167A
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US3084123A
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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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |