US3620792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating carbon black
Assignee: CABAT CORP
•
Filing: 1969-03-26
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Granted: 1971-11-16
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Expires: 1989-03-26
Abstract
Abstract This disclosure relates to the use of an oxide of nitrogen in combination with ozone as an additive in an aftertreatment process for preparing modified carbon blacks and to the novel carbon black products produced thereby.
Inventors
- 👤 Erivan Hagopian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:15
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/565; C01; C01P; C01P2004/00; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
A process as defined in claim 1 wherein said carbon black is a furnace black.
Claim 2
Dependent Claim
46 words
A process as defined in claim 1 wherein said carbon black is contacted with an effective amount of said gaseous mixture sufficient to prepare a modified carbon black containing from about 6 to about 20 percent by weight of the carbon black of said gaseous mixture.
Claim 3
Dependent Claim
46 words
A process as defined in claim 1 wherein said carbon black is contacted with an effective amount of said gaseous mixture sufficient to prepare a modified carbon black containing from about 9 to about 18 percent by weight of the carbon black of said gaseous mixture.
Claim 4
Dependent Claim
20 words
A process as defined in claim 1 wherein the temperature range is from about 100* C. to about 225* C.
Claim 5
Dependent Claim
30 words
A process as defIned in claim 1 wherein the molar ratio of the ozone to the oxide of nitrogen in said gaseous mixture is from about 1:1 to about 1:2.
Claim 6
Dependent Claim
18 words
A process as defined in claim 1 wherein said oxide of nitrogen is nitric oxide or nitrogen dioxide.
Claim 7
Dependent Claim
60 words
A modified carbon black especially suitable for use as an ink pigment containing from about 1 to about 50 percent by weight of the carbon black of a gaseous mixture comprising ozone and an oxide of nitrogen, wherein the molar ratio of the ozone to the oxide of nitrogen in said gaseous mixture is from about 1:0.1 to about 1:2.5.
Claim 8
Dependent Claim
32 words
A modified carbon black as defined in claim 8 wherein the molar ratio of the ozone to the oxide of nitrogen in said gaseous mixture is from about 1:1 to about 1:2.
Claim 9
Dependent Claim
31 words
A modified carbon black as defined in claim 9 wherein said carbon black contains from about 6 to about 20 percent by weight of the carbon black of said gaseous mixture.
References Cited (Backward Citations)
GB895990A
Cited
US3226244A
Cited
US3247003A
Cited
US3279935A
Cited
US3398009A
Cited
US3436240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |