Patent US4427831A successfully refreshed from Google Patents.
US4427831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber materials having excellent grip on ice
Assignee: Zeon Corp
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Filing: 1981-07-30
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Granted: 1984-01-24
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Expires: 2001-07-30
Abstract
Abstract A rubber material having an excellent grip on ice comprising a mixture of an ordinary rubber and a powdered polymer, said powdered polymer having a maximum of tan δ at a temperature in the range of -5° C. to +35° C. when the tan δ is measured by a nonresonance, forced vibration apparatus at a frequency of 110 hertz and a heating rate of 2° C./minute.
Inventors
- 👤 Keiji Komuro
- 👤 Akio Ueda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:26
CPC Classifications
C; C08; C08L; C08L9/00; C08L9/06; B; B60; B60C; B60C1/00; B60C1/0016; C08L21/00; C08L7/00; C08L45/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A rubber material capable of being formed into rubber articles such as tires and shoe soles which have an excellent grip on ice surface and which do not damage ice-free surfaces in contact with the rubber articles, said material comprising a mixture of an ordinary rubber and a powder of norbornene polymer which hardens at service temperatures on ice and softens at higher temperatures and which does not lose its shape as a powder when heated during curing or shaping, wherein the ordinary rubber is a butadiene rubber, a styrene-butadiene rubber, an isoprene rubber, or a natural rubber.
Claim 2
Dependent Claim
98 words
A rubber material capable of being formed into rubber articles such as tires and shoe soles which have an excellent grip on ice surface and which do not damage ice-free surfaces in contact with the rubber articles, said material comprising a mixture of an ordinary rubber and a powder of norbornene polymer which hardens at service temperatures on ice and softens at higher temperatures and which does not lose its shape as a powder when heated during curing or shaping, wherein the ordinary rubber is a butadiene rubber, a styrene-butadiene rubber, an isoprene rubber, or a natural rubber.
Claim 3
Dependent Claim
30 words
The rubber material of claim 1 which comprises a mixture of 100 parts by weight of the ordinary rubber and 5 to 100 parts by weight of the norbornene polymer.
Claim 4
Dependent Claim
12 words
A rubber article obtained by vulcanizing the rubber material of claim 1.
Claim 5
Dependent Claim
10 words
The rubber article of claim 3 which is a tire.
Claim 6
Dependent Claim
11 words
The rubber articles of claim 3 which is a shoe sole.
Claim 7
Dependent Claim
30 words
The rubber material of claim 1 which comprises a mixture of 100 parts by weight of the ordinary rubber and 5 to 50 parts by weight of the norbornene polymer.
Claim 8
Dependent Claim
60 words
The rubber material of claim 1 wherein the loss tangent (tan δ) of the powder of the norbornene polymer is at a maximum at a temperature in the range of -5° C. to +35° C., when the tan δ is measured by a nonresinous, forced vibration apparatus at a frequency of 110 Hertz and a heating rate of 2° C./minute.
Claim 9
Dependent Claim
22 words
The rubber article of claim 7 wherein the partice size of the powder of the norbornene polymer is larger than 0.1 mm.
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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) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |