US5173135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial tire for pssenger cars with sidewall rubber including electrically conductive carbon black
Assignee: Yokohama Rubber Co Ltd
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Filing: 1991-11-21
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Granted: 1992-12-22
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Expires: 2011-11-21
Abstract
Abstract A radial tire for passenger cars constructed with a sidewall portion formed from a rubber composition having of a volume resistivity of not more than 10 4 Ωcm. The composition is comprised essentially of a selected rubber and a selected carbon black of an electrically conductive type. The tire is highly resistant to staining with mud and dust while in running and also with dirt pickup during storage.
Inventors
- 👤 Akinori Tokieda
- 👤 Tetsuji Kawazura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:37
CPC Classifications
B; B60; B60C; B60C13/00; B60C13/002; B60C19/00; B60C19/08; Y; Y10; Y10S; Y10S152/00; Y10S152/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A radial-ply tire for use in passenger cars, which comprises a tread portion and two opposite sidewall portions, each of said sidewall portions being formed, at least on an outer surface thereof, from a rubber composition comprising a vulcanizable rubber selected from the group consisting of natural rubber, polyisoprene rubber, butadiene rubber, styrene-butadiene rubber and combinations thereof and an electrically conductive carbon black having a surface area by nitrogen adsorption in the range of from 100 to 150 m 2 /g, a dibutyl phthalate adsorption in the range of from 90 to 130 ml/100 g, a pH in the range of from 7.0 to 8.0 and a volatile content in the range of from 1.0 to 3.0, said carbon black being present in an amount of from 5 to 25 parts by weight per 100 parts by weight of said rubber and said rubber composition having a volume resistivity of not more than 10 4 Ωcm.
Claim 2
Dependent Claim
156 words
A radial-ply tire for use in passenger cars, which comprises a tread portion and two opposite sidewall portions, each of said sidewall portions being formed, at least on an outer surface thereof, from a rubber composition comprising a vulcanizable rubber selected from the group consisting of natural rubber, polyisoprene rubber, butadiene rubber, styrene-butadiene rubber and combinations thereof and an electrically conductive carbon black having a surface area by nitrogen adsorption in the range of from 100 to 150 m 2 /g, a dibutyl phthalate adsorption in the range of from 90 to 130 ml/100 g, a pH in the range of from 7.0 to 8.0 and a volatile content in the range of from 1.0 to 3.0, said carbon black being present in an amount of from 5 to 25 parts by weight per 100 parts by weight of said rubber and said rubber composition having a volume resistivity of not more than 10 4 Ωcm.
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) | 1995-12-22 | 1996-06-22 | 1996-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-22 | 2000-06-22 | 2000-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-22 | 2004-06-22 | 2004-12-22 | $7700.00 | Window Closed / Lapsed |