US3973983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black pigments and rubber compositions containing the same
Assignee: Cabot Corp
•
Filing: 1974-08-08
•
Granted: 1976-08-10
•
Expires: 1994-08-08
Abstract
Abstract This disclosure relates to a certain class of carbon black products having high surface area and very low degree of porosity and the use thereof as reinforcing additives in the preparation of rubber compositions having improved properties.
Inventors
- 👤 Merrill E. Jordan
- 👤 William G. Burbine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:42
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C08; C08K; C08K3/00; C08K3/02; C08K3/04; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A carbon black product characterized by having a total surface area of at least about 160 m 2 /g, a value for the ratio of non-porous specific surface area to total surface area of the carbon black of at least 0.9, a value for the tint factor relationship of, wherein D a is apparent diameter of less than 317, and a DBP absorption of at least 90 cc/100 gms of black.
Claim 2
Dependent Claim
71 words
A carbon black product characterized by having a total surface area of at least about 160 m 2 /g, a value for the ratio of non-porous specific surface area to total surface area of the carbon black of at least 0.9, a value for the tint factor relationship of, wherein D a is apparent diameter of less than 317, and a DBP absorption of at least 90 cc/100 gms of black.
Claim 3
Dependent Claim
21 words
A carbon black product as defined in claim 1 wherein the total surface area is at least 170 m 2 /g.
Claim 4
Dependent Claim
21 words
A carbon black product as defined in claim 1 wherein the DBP absorption is at least 100 cc/100 gms of black.
Claim 5
Dependent Claim
40 words
A carbon black product as defined in claim 1 wherein the total surface area is 170 m 2 /g, and the value for the ratio of non-porous specific surface area to total surface area of the carbon black is 0.95.
Claim 6
Dependent Claim
40 words
A carbon black product as defined in claim 1 wherein the total surface area is 160 m 2 /g, and the value for the ratio of non-porous specific surface area to total surface area of the carbon black is 0.96.
Claim 7
Dependent Claim
40 words
A carbon black product as defined in claim 1 wherein the total surface area is 163 m 2 /g, and the value for the ratio of non-porous specific surface area to total surface area of the carbon black is 0.97.
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) | 1979-08-10 | 1980-02-09 | 1980-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-10 | 1984-02-09 | 1984-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-10 | 1988-02-09 | 1988-08-10 | $7700.00 | Window Closed / Lapsed |