US4041207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat resistant rubber laminates
Assignee: Bridgestone Corp
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Filing: 1976-10-07
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Granted: 1977-08-09
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Expires: 1996-10-07
Abstract
Abstract A heat resistant rubber laminate composed of a base layer consisting mainly of a heat resistant rubber composition and a heat resistant top cover consisting mainly of an ethylene-fluoropropylene copolymeric rubber.
Inventors
- 👤 Tsutomu Takada
- 👤 Shingo Kato
- 👤 Tadashi Utsunomiya
- 👤 Sakae Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:54
CPC Classifications
B; B32; B32B; B32B25/00; B32B25/04; B32B25/042; B32B25/14; C; C09; C09D; C09D123/00; C09D123/02; C09D123/04; C09D123/08; B32B2307/00; B32B2307/30; B32B2307/306; B32B2433/00; B32B2433/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1386; Y10T428/31504; Y10T428/3154; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
40 words
A heat resistant rubber laminate composed of a base layer consisting mainly of a heat resistant rubber composition and a heat resistant top cover, wherein said heat resistant top cover being a rubber composition consisting mainly of ethylene-fluoropropylene copolymeric rubber.
Claim 2
Dependent Claim
40 words
A heat resistant rubber laminate composed of a base layer consisting mainly of a heat resistant rubber composition and a heat resistant top cover, wherein said heat resistant top cover being a rubber composition consisting mainly of ethylene-fluoropropylene copolymeric rubber.
Claim 3
Dependent Claim
44 words
The heat resistant rubber laminate as claimed in claim 1, wherein the rubber of the top cover is an ethylene-fluoropropylene copolymeric rubber or a blend of an ethylene-fluoropropylene copolymeric rubber with at least one of an ethylene-olefin copolymeric rubber or a halogenated butyl rubber.
Claim 4
Dependent Claim
31 words
The heat resistant rubber laminate as claimed in claim 2, wherein the rubber of the top cover is a blend of an ethylene-fluoropropylene copolymeric rubber with an ethylene-α olefin copolymeric rubber.
Claim 5
Dependent Claim
30 words
The heat resistant rubber laminate as claimed in claim 2, wherein the rubber of the top cover is a blend of an ethylene-fluoropropylene copolymeric rubber with a halogenated butyl rubber.
Claim 6
Dependent Claim
35 words
The heat resistant rubber laminate as claimed in claim 2, wherein the rubber of the top cover is a blend of an ethylene-fluoropropylene copolymeric rubber with ethylene-α olefin copolymeric rubber and a halogenated butyl rubber.
Claim 7
Dependent Claim
23 words
The heat resistant rubber laminate as claimed in claim 1, wherein the ethylene-fluoropropylene copolymeric rubber is ethylene-hexafluoropropylene copolymeric rubber or ethylene-trifluoropropylene copolymeric rubber.
Claim 8
Dependent Claim
19 words
The heat resistant rubber laminate as claimed in claim 6, wherein the ethylene-fluoropropylene copolymeric rubber is ethylene-hexafluoropropylene copolymeric rubber.
Claim 9
Dependent Claim
23 words
The heat resistant rubber laminate as claimed in claim 1, wherein a content of fluoropropylene in the ethylene-fluoropropylene copolymeric rubber is 10-50 mol%.
Claim 10
Dependent Claim
25 words
The heat resistant rubber laminate as claimed in claim 2, wherein the ethylene-α olefin copolymeric rubber is ethylene-propylene copolymeric rubber or ethylene-propylene-nonconjugated diene copolymeric rubber.
Claim 11
Dependent Claim
20 words
The heat resistant rubber laminate as claimed in claim 9, wherein the ethylene-α olefin copolymeric rubber is ethylene-propylene copolymeric rubber.
Claim 12
Dependent Claim
23 words
The heat resistant rubber laminate as claimed in claim 2, wherein the halogenated butyl rubber is chlorinated butyl rubber or brominated butyl rubber.
Claim 13
Dependent Claim
19 words
The heat resistant rubber laminate as claimed in claim 11, wherein the halogenated butyl rubber is chlorinated butyl rubber.
Claim 14
Dependent Claim
27 words
The heat resistant rubber laminate as claimed in claim 3, wherein the weight amount of the ethylene-fluoropropylene copolymeric rubber to the ethylene-α olefin copolymeric rubber is 95/5-40/60.
Claim 15
Dependent Claim
26 words
The heat resistant rubber laminate as claimed in claim 4, wherein the weight amount of the ethylene-fluoropropylene copolymeric rubber to the halogenated butyl rubber is 95/5-60/40.
Claim 16
Dependent Claim
43 words
The heat resistant rubber laminate as claimed in claim 5, wherein the weight amount of the ethylene-fluoropropylene copolymeric rubber and ethylene-α olefin copolymeric rubber and the halogenated butyl rubber is 40-90/5-30/5-30, when the total amount of these rubbers is 100 parts by weight.
Claim 17
Dependent Claim
23 words
The heat resistant rubber laminate as claimed in claim 1, wherein the top cover composition contains an organic peroxide as a crosslinking agent.
Claim 18
Dependent Claim
51 words
The heat resistant rubber laminate as claimed in claim 1, wherein the base layer is a rubber composition in which an ethylene-α olefin copolymeric rubber or a blend of an ethylene-α olefin copolymeric rubber and a halogenated butyl rubber are compounded and a core layer is included within said base layer.
Claim 19
Dependent Claim
19 words
The heat resistant rubber laminate as claimed in claim 1, wherein said laminate is a heat resistant conveyor belt.
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) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |