Patent US3638702A successfully refreshed from Google Patents.
US3638702A
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Tire tread compositions
Assignee: Goodyear Tire and Rubber Co
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Filing: 1968-02-23
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Granted: 1972-02-01
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Expires: 1988-02-23
Abstract
Abstract Vehicle tires possessing a tread composition containing rubbery polymers, a methylene acceptor, a methylene donor and a low level of sulfur.
Inventors
- 👤 Norman G Endter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:06
CPC Classifications
B; B60; B60C; B60C1/00; B60C1/0016; C; C08; C08L; C08L21/00; Y; Y10; Y10S; Y10S152/00; Y10S152/905
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
The vulcanizable tread composition according to claim 1 wherein the sulfur level is from about 0.5 to about 1.0 part by weight per 100 parts by weight of rubbery polymer.
Claim 2
Dependent Claim
36 words
The vulcanizable tread composition according to claim 1 wherein the molar ratio of the methylene acceptor to the methylene donor is at least equal to the stoichiometric ratio of the methylene acceptor to the methylene donor.
Claim 3
Dependent Claim
14 words
The tread composition of claim 1 wherein the pneumatic tire is a truck tire.
Claim 4
Dependent Claim
16 words
The tread composition according to claim 1 wherein the tire is an off the road tire.
Claim 5
Dependent Claim
30 words
The vulcanizable tread composition of claim 1 wherein the methylene donor is selected from the group consisting of hexamethylenetetramine and complexes of hexamethylenetetramine and wherein the methylene acceptor is resorcinol.
Claim 6
Dependent Claim
19 words
The vulcanizable tread composition of claim 1 wherein the methylene donor is a toluene sulfonic acid complex of hexamethylenetetramine.
Claim 7
Dependent Claim
74 words
The tread composition according to claim 1 wherein the rubbery polymer is comprised of from about 10 to about 90 parts of at least one polymer selected from the group consisting of natural rubber and a synthetic polyisOprene rubber possessing a cis-1,4 conformation in excess of about 90 percent and from about 90 to about 10 parts of at least one cis-1,4 polybutadiene rubber possessing a cis conformation in excess of about 35 percent.
Claim 8
Dependent Claim
93 words
The tread composition according to claim 1 wherein the rubbery polymer is comprised of from about 10 to about 30 parts by weight of at least one polymer selected from the group consisting of natural rubber and a synthetic polyisoprene rubber possessing a cis-1,4 content in excess of 90 percent, from about 10 to about 30 parts by weight of at least one elastomeric butadiene/styrene copolymer rubber and from about 40 to about 60 parts by weight of at least one cis-1,4 polybutadiene rubber possessing a cis conformation in excess of 35 percent.
Claim 9
Dependent Claim
13 words
A vulcanized pneumatic tire prepared by vulcanizing the pneumatic tire of claim 1.
References Cited (Backward Citations)
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |