US3212878A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Physical or chemical treatment of fine powdery materials having a controlled granulometry
Assignee: Individual
•
Filing: 1962-07-30
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Granted: 1965-10-19
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Expires: 1982-07-30
Abstract
No abstract record available.
Inventors
- 👤 Bouteille Charles Yves Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:33
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B03; B03C; B03C7/00; B03C7/003; B22; B22F; B22F1/00; B22F1/14; C; C22; C22B; C22B1/00; C22B1/02; B22F2999/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A METHOD OF TREATING GRAINS OF AN ELECTRICALLY CONDUCTIVE MATERIAL HAVING A PREDETERMINED GRANULOMETRIC DISTRIBUTION, WHICH COMPRISES THE STEPS OF SUSPENDING GRAINS OF A STARTING MATERIAL IN AN ELECTRICALLY NON-CONDUCTIVE FLUID, SAID GRAINS BEING ALL OF THE SAME NATURE AND HAVING A PREDETERMINED GRANULOMETRIC DISTRIBUTION, ELECTROSTATICALLY CHARGING EACH OF THE GRAINS WITH A CHARGE OF THE SAME SIGN IN ORDER TO SET THE GRAINS APART FROM EACH OTHER, TRANSPORTING THE CHARGED AND SET-APART GRAINS TO A TREATMENT ZONE, SUBJECTING THE GRAINS TO A TREATMENT WHILE IN SAID TREATMENT ZONE, AND SEPARATING SAID GRAINS FROM SAID FLUID.
Claim 2
Independent Claim
96 words
A METHOD OF TREATING GRAINS OF AN ELECTRICALLY CONDUCTIVE MATERIAL HAVING A PREDETERMINED GRANULOMETRIC DISTRIBUTION, WHICH COMPRISES THE STEPS OF SUSPENDING GRAINS OF A STARTING MATERIAL IN AN ELECTRICALLY NON-CONDUCTIVE FLUID, SAID GRAINS BEING ALL OF THE SAME NATURE AND HAVING A PREDETERMINED GRANULOMETRIC DISTRIBUTION, ELECTROSTATICALLY CHARGING EACH OF THE GRAINS WITH A CHARGE OF THE SAME SIGN IN ORDER TO SET THE GRAINS APART FROM EACH OTHER, TRANSPORTING THE CHARGED AND SET-APART GRAINS TO A TREATMENT ZONE, SUBJECTING THE GRAINS TO A TREATMENT WHILE IN SAID TREATMENT ZONE, AND SEPARATING SAID GRAINS FROM SAID FLUID.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-18 | 1969-04-19 | 1969-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-18 | 1973-04-19 | 1973-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-18 | 1977-04-19 | 1977-10-19 | $7700.00 | Window Closed / Lapsed |