US4351815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery carbon black
Assignee: Columbian Chemicals Co
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Filing: 1981-02-06
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Granted: 1982-09-28
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Expires: 2001-02-06
Abstract
Abstract Carbon black products useful as an ingredient in dry cell battery compositions are disclosed which have a wide aggregate size distribution with a range of measured aggregate volume from about 5×10 4 to about 1×10 9 nm 3 , a geometric mean aggregate volume (Log Vg, nm 3 ) of about 6.2 to about 7.5, geometric standard deviation (for Log Vg, nm 3 ) of about 0.7 to about 1.0, a dibutyl phthalate absorption ranging from about 210 to about 270 cc/100 g., a nitrogen surface area ranging from about 30 to about 60 m 2 /g, an average stacking height (L c ) of ordered graphitic layer segments ranging from about 2.7 to about 3.7 nm. Novel furnace carbon blacks are disclosed which have the same characteristics but have an average stacking height (Lc) of ordered graphitic layer segments ranging from about 1.6 to about 3.7 nm.
Inventors
- 👤 Fred E. Glasstetter
- 👤 Frank J. Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/64; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
A carbon black having a geometric mean aggregate volume (Log Vg, nm 3 ) ranging from about 6.2 to abut 7.5, a dibutylphthalate absorption (DBPA) between about 210 and about 270 cc/100 g, a nitrogen surface area between about 30 and about 60 m 2 /g and an average stacking height (L c ) of ordered graphitic layer segments ranging from about 2.7 to about 3.7 nm.
Claim 2
Dependent Claim
67 words
A carbon black having a geometric mean aggregate volume (Log Vg, nm 3 ) ranging from about 6.2 to abut 7.5, a dibutylphthalate absorption (DBPA) between about 210 and about 270 cc/100 g, a nitrogen surface area between about 30 and about 60 m 2 /g and an average stacking height (L c ) of ordered graphitic layer segments ranging from about 2.7 to about 3.7 nm.
Claim 3
Dependent Claim
68 words
A furnace black having a geometric mean aggregate volume (Log Vg, nm 3 ) ranging from about 6.2 to about 7.5, a dibutyl phthalate absorption (DBPA) between about 210 and about 270 cc/100 g, a nitrogen surface area between about 30 and about 60 m 2 /g and an average stacking height (L c ) of ordered graphitic layer segments ranging from about 1.6 to about 3.7 nm.
Claim 4
Dependent Claim
68 words
A furnace black having a geometric mean aggregate volume (Log Vg, nm 3 ) ranging from about 6.2 to about 7.5, a dibutyl phthalate absorption (DBPA) between about 210 and about 270 cc/100 g, a nitrogen surface area between about 30 and about 60 m 2 /g and an average stacking height (L c ) of ordered graphitic layer segments ranging from about 1.6 to about 3.7 nm.
Claim 5
Dependent Claim
60 words
The furnace carbon black of claim 1 and having a wide bimodal aggregate size distribution with a range of aggregate volume from about 5×10 4 to about 1×10 9 nm 3 and a geometric mean standard deviation of about 0.7 to 1.0 for a geometric mean aggregate volume (Log Vg, nm 3 ) ranging from about 6.2 to about 7.5.
Claim 6
Dependent Claim
21 words
The furnace black of claim 1 or 2 wherein the nitrogen surface area is between 40 and 50 m 2 /g.
Claim 7
Dependent Claim
33 words
The carbon black of claim 1, 2, or 3 wherein the carbon black attained its L c by being heat treated between 1400° and 2400° C. for 9-21 sec. in an inert atmosphere.
Claim 8
Dependent Claim
17 words
The carbon black of claim 1 wherein L c is between about 3.0 and about 3.7 nm.
Claim 9
Dependent Claim
17 words
The carbon black of claim 2 wherein L c is between about 2.0 and about 3.7 nm.
Claim 10
Dependent Claim
17 words
The carbon black of claim 2 wherein L c is between about 3.0 and about 3.7 nm.
Claim 11
Dependent Claim
23 words
The carbon black of claim 1 or 2 wherein the geometric standard deviates (Log Vg, nm 3 ) is between 0.7 and 1.0.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |