US4374113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of high surface area carbon blacks
Assignee: Cabot Corp
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Filing: 1981-04-30
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Granted: 1983-02-15
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Expires: 2001-04-30
Abstract
Abstract This disclosure relates to an improved furnace process for producing carbon blacks by the incomplete combustion of hydrocarbonaceous feedstock wherein the resultant blacks have higher surface areas than the carbon blacks normally prepared from the feedstocks, as a result of which the blacks are particularly suitable for use in imparting conductivity properties to plastic materials and the like. This disclosure also relates to the production of a novel class of furnace blacks having excellent conductivity properties and which are characterized by high surface areas and low pH values.
Inventors
- 👤 Barrie J. Yates
- 👤 Ronald C. Hurst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:38
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19; C01P2006/40
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
36 words
A furnace-type carbon black product characterized by having an iodine surface area of at least 600 m 2 /g, a pH value of less than 5 and a DBP value of at least 160 cc/100 g.
Claim 2
Dependent Claim
36 words
A furnace-type carbon black product characterized by having an iodine surface area of at least 600 m 2 /g, a pH value of less than 5 and a DBP value of at least 160 cc/100 g.
Claim 3
Dependent Claim
19 words
A product as defined in claim 1 wherein the iodine surface area is at least 800 m 2 /g.
Claim 4
Dependent Claim
22 words
A product as defined in claim 1 wherein the iodine surface area ranges from about 800 to about 1100 m 2 /g.
Claim 5
Dependent Claim
18 words
A product as defined in claim 1 wherein the the pH ranges from about 2 to about 4.
Claim 6
Dependent Claim
17 words
A product as defined in claim 2 wherein the pH ranges from about 2 to about 4.
Claim 7
Dependent Claim
17 words
A product as defined in claim 1 wherein the pH ranges from about 3 to about 4.
Claim 8
Dependent Claim
17 words
A product as defined in claim 2 wherein the pH ranges from about 3 to about 4.
Claim 9
Dependent Claim
20 words
A product as defined in claim 1 wherein the DBP value ranges from about 180 to about 350 cc/100 g.
Claim 10
Dependent Claim
20 words
A product as defined in claim 2 wherein the DBP value ranges from about 180 to about 350 cc/100 g.
Claim 11
Dependent Claim
20 words
A product as defined in claim 2 wherein the DBP value ranges from about 180 to about 275 cc/100 g.
Claim 12
Dependent Claim
30 words
A product as defined in claim 3 wherein the pH ranges from about 3 to about 4 and the DBP value ranges from about 180 to about 275 cc/100 g.
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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |