US3421991A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of carbon aggregate
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1966-03-22
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Granted: 1969-01-14
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Expires: 1986-03-22
Abstract
No abstract record available.
Inventors
- 👤 Richard D Hildebrandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:23
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/02; C25C7/025; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN THE METHOD FOR PREPARING CARBON MATERIAL FOR ANODE AND CATHODE ELECTRODES BY BLENDING VARIOUS SIZE FRACTIONS OF A CONVENTIONAL CARBON COKE MATERIAL TO FORM A GRADED SIZE DISTRIBUTION WHICH GIVES A DESIRED GREEN BULK DENSITY, THE IMPROVEMENT COMPRISING: (A) CRUSHING A CHARGE OF AS-RECEIVED COARSE CARBON MATERIAL CONSISTING ESSENTIALLY OF 100% PLUS 4 TYLER SCREEN MESH PARTICLE SIZE IN A CONFINED CHAMBER IN A PRESS UNDER A PRESSURE OF FROM 1000-20,000 P.S.I. WHEREBY THE WEAKER PARTICLES CRUMBLE AND FILL IN BETWEEN THE STRONGER PARTICLES UNTIL THERE IS SUFFICIENT DOVING-TAILING TO BEAR THE FULL PRESSURE LOAD WITHOUT FURTHER DGRADATION SO AS TO OBTAIN A NATURAL AND REPRODUCIBLE PARTICLE SIZE DISTRIBUTION HAVING A SPECIFIC FIRST BULK DENSITY; AND (B) ADDING FINE PARTICLE SIZE CARBON MATERIAL SO AS TO OBTAIN THE DESIRED PARTICLE SIZE DISTRIBUTION AND SECOND BULK DENSITY.
Claim 2
Dependent Claim
137 words
IN THE METHOD FOR PREPARING CARBON MATERIAL FOR ANODE AND CATHODE ELECTRODES BY BLENDING VARIOUS SIZE FRACTIONS OF A CONVENTIONAL CARBON COKE MATERIAL TO FORM A GRADED SIZE DISTRIBUTION WHICH GIVES A DESIRED GREEN BULK DENSITY, THE IMPROVEMENT COMPRISING: (A) CRUSHING A CHARGE OF AS-RECEIVED COARSE CARBON MATERIAL CONSISTING ESSENTIALLY OF 100% PLUS 4 TYLER SCREEN MESH PARTICLE SIZE IN A CONFINED CHAMBER IN A PRESS UNDER A PRESSURE OF FROM 1000-20,000 P.S.I. WHEREBY THE WEAKER PARTICLES CRUMBLE AND FILL IN BETWEEN THE STRONGER PARTICLES UNTIL THERE IS SUFFICIENT DOVING-TAILING TO BEAR THE FULL PRESSURE LOAD WITHOUT FURTHER DGRADATION SO AS TO OBTAIN A NATURAL AND REPRODUCIBLE PARTICLE SIZE DISTRIBUTION HAVING A SPECIFIC FIRST BULK DENSITY; AND (B) ADDING FINE PARTICLE SIZE CARBON MATERIAL SO AS TO OBTAIN THE DESIRED PARTICLE SIZE DISTRIBUTION AND SECOND BULK DENSITY.
References Cited (Backward Citations)
US2527595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |