Patent US3602437A successfully refreshed from Google Patents.
US3602437A
Expired / Lapsed
US
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Attritioning of carbon black
Assignee: Cities Service Co
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Filing: 1970-03-02
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Granted: 1971-08-31
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Expires: 1990-03-02
Abstract
Abstract Carbon black structure is reduced by grinding the black in a ball mill. The grinding rate is increased and the grinding energy requirement is reduced by moistening the black with water to provide a dense, moist powdery mass of black that is subjected to the attritioning action of the ball mill. The proportion of water to carbon black is generally within the range of about 20 to about 100 parts by weight of water per 100 parts by weight of black.
Inventors
- 👤 Richard E Driscoll
- 👤 Charles H Mccallum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:44
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C01; C01P; C01P2006/00; C01P2006/19
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
36 words
The process of claim 1 wherein the proportion of water to carbon black is within the range of about 20 to about 100 parts by weight of water per 100 parts by weight of carbon black.
Claim 2
Dependent Claim
36 words
The process of claim 1 wherein the proportion of water to carbon black is within the range of about 20 to about 80 parts by weight of water per 100 parts by weight of carbon black.
Claim 3
Dependent Claim
24 words
The process of claim 1 wherein the moisture content of the ground carbon black is reduced to provide a substantially dry carbon black product.
Claim 4
Dependent Claim
25 words
The process of claim 4 wherein the moisture content of said carbon black is reduced to not in excess of about 10 percent by weight.
Claim 5
Dependent Claim
25 words
The process of claim 4 wherein the moisture content of said carbon black is reduced to not in excess of about 5 percent by weight.
Claim 6
Dependent Claim
18 words
The process of claim 1 wherein the ball mill is vigorously vibrated for attritioning of the carbon black.
Claim 7
Dependent Claim
23 words
The process of claim 1 wherein the structured carbon black is an intermediate structure oil furnace black or a high-structure oil furnace black.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |