Patent US4226758A successfully refreshed from Google Patents.
US4226758A
Expired / Lapsed
US
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Friction material
Assignee: Gandy Frictions Ltd
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Filing: 1978-02-23
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Granted: 1980-10-07
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Expires: 1998-02-23
Abstract
Abstract An improved friction material for brakes and clutches, in which asbestos is partly or completely replaced by an artificial mineral fibre, in particular a blown alumino-silicate fibre made from the mineral kaolin.
Inventors
- 👤 Arthur Sumira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:12
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/025; F16D69/026; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
30 words
A friction material wherein the asbestos fibres are substantially completely replaced by blown alumino-silicate ceramic fibres made from the mineral kaolin, said alumino-silicate fibres being substantially free of water glass.
Claim 2
Dependent Claim
30 words
A friction material wherein the asbestos fibres are substantially completely replaced by blown alumino-silicate ceramic fibres made from the mineral kaolin, said alumino-silicate fibres being substantially free of water glass.
Claim 3
Dependent Claim
20 words
Friction material as in claim 1 containing 5 percent to 70 percent by weight of the said blown alumino-silicate fibre.
Claim 4
Dependent Claim
39 words
A friction material according to claim 1 characterised by the following composition: Phenolic resin 8-25% by weight Blown aluminosilicate fibre 5-70% by weight Mineral filler 10-40% by weight Metallic filler 10-40% by weight High Temperature Lubricant 1-15% by weight
References Cited (Backward Citations)
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US3450236A
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US3896075A
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US3891595A
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US4127556A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-07 | 1984-04-07 | 1984-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-07 | 1988-04-07 | 1988-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-07 | 1992-04-07 | 1992-10-07 | $7700.00 | Window Closed / Lapsed |