Patent US3091023A successfully refreshed from Google Patents.
US4385151A
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Composition containing isoprene polymer
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1981-11-24
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Granted: 1983-05-24
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Expires: 2001-11-24
Abstract
Abstract A rubber composition containing an isoprene homopolymer or copolymer having a glass transition temperature of not less than -50 DEG C. and a Mooney viscosity of 20 to 120. The composition can provide a cured rubber having a high wet road gripping force and a small dynamic heat generating characteristic, and is very suitable for use in tires of automobiles.
Inventors
- 👤 Hiroshi Furukawa
- 👤 Yuichi Saito
- 👤 Akio Imai
- 👤 Keisaku Yamamoto
- 👤 Tomoaki Seki
- 👤 Nobuyuki Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:53
CPC Classifications
C; C08; C08L; C08L9/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A rubber composition comprising 100 parts by weight of an isoprene homopolymer or butadiene-isoprene copolymer having a glass transition temperature of not less than -50° C. and a Mooney viscosity ML1+4(121° C.) of 20 to 120, 20 to 150 parts by weight of carbon black, less than 100 parts by weight of a process oil, 0.5 to 5 parts by weight of sulfur, 0.1 to 10 parts by weight of a curing accelerator and less than 6 parts by weight of an antioxidant.
Claim 2
Dependent Claim
83 words
A rubber composition comprising 100 parts by weight of an isoprene homopolymer or butadiene-isoprene copolymer having a glass transition temperature of not less than -50° C. and a Mooney viscosity ML1+4(121° C.) of 20 to 120, 20 to 150 parts by weight of carbon black, less than 100 parts by weight of a process oil, 0.5 to 5 parts by weight of sulfur, 0.1 to 10 parts by weight of a curing accelerator and less than 6 parts by weight of an antioxidant.
References Cited (Backward Citations)
US3669943A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |