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US2886530A Expired / Lapsed US ⏱️ 0.0 years remaining

Process of manufacturing ceramic ferrites

Assignee: Individual
•
Filing: 1955-07-19
•
Granted: 1959-05-12
•
Expires: 1975-07-19
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Abstract

No abstract record available.

Inventors

  • 👤 Greger Herbert Hans

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 02:24
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/26; C04B35/2608; C04B35/2625

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 131 words
IN A METHOD OF REPRODUCIBLY MANUFACTURING FERRITIC CERAMIC PRODUCTS WITH CORRESPONDING ELECTRIC AND MAGNETIC PROPERTIES FROM DRY MATERIALS, THE STEPS OF MIXING A BATCH OF PARTICLES CONSISTING ESSENTIALLY OF 20-80% FE2O3, 20-80, MGO, AND 0-4% MNO WITH VOLATILE LIQUID HYDROCARBON SOLVENT AND WITH A FATTY ACID CONTAINING 4-18 CARBON ATOMS TO FORM A SLURRY WITH THE SURFACES OF THE PARTICLES HAVING LIPOPHILIC PROPERTIES, THE ACID BEING FROM 2-10% OF THE WEIGHT OF THE BATCH, REMOVING EXCESS SOLVENT TO DRY THE RESULTING PRODUCT, HOMOGENTIZING THE RESULTING PRODUCT WITH A SMALL AMOUNT OF SAID SOLVENT SUFFICIENT TO MAKE THE LAST SAID PRODUCT INTO A SHAPABLE PLASTIC MASS, HOMOGENIZING THE PLASTIC MASS, FORMING THE HOMOGENIZED PLASTIC MASS INTO A SHAPE, AND FIRING SAID SHAPE AT A TEMPERATURE OF APPROXIMATELY 1200*-1450* C. TO SOLIDIFY IT.
Claim 2
Dependent Claim 131 words
IN A METHOD OF REPRODUCIBLY MANUFACTURING FERRITIC CERAMIC PRODUCTS WITH CORRESPONDING ELECTRIC AND MAGNETIC PROPERTIES FROM DRY MATERIALS, THE STEPS OF MIXING A BATCH OF PARTICLES CONSISTING ESSENTIALLY OF 20-80% FE2O3, 20-80, MGO, AND 0-4% MNO WITH VOLATILE LIQUID HYDROCARBON SOLVENT AND WITH A FATTY ACID CONTAINING 4-18 CARBON ATOMS TO FORM A SLURRY WITH THE SURFACES OF THE PARTICLES HAVING LIPOPHILIC PROPERTIES, THE ACID BEING FROM 2-10% OF THE WEIGHT OF THE BATCH, REMOVING EXCESS SOLVENT TO DRY THE RESULTING PRODUCT, HOMOGENTIZING THE RESULTING PRODUCT WITH A SMALL AMOUNT OF SAID SOLVENT SUFFICIENT TO MAKE THE LAST SAID PRODUCT INTO A SHAPABLE PLASTIC MASS, HOMOGENIZING THE PLASTIC MASS, FORMING THE HOMOGENIZED PLASTIC MASS INTO A SHAPE, AND FIRING SAID SHAPE AT A TEMPERATURE OF APPROXIMATELY 1200*-1450* C. TO SOLIDIFY IT.

References Cited (Backward Citations)

DE294660C Cited
US1795011A Cited
GB531676A Cited
US2388446A Cited
US2388447A Cited
FR913846A Cited
US2463994A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1962-05-11 1962-11-10 1963-05-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1966-05-11 1966-11-10 1967-05-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1970-05-11 1970-11-10 1971-05-12 $7700.00 Window Closed / Lapsed

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