US2898216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Friction material
Assignee: Dunlop Rubber Co Ltd
•
Filing: 1957-04-30
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Granted: 1959-08-04
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Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 Bray Horace Arthur
- 👤 Peppitt Eric William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:12
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A MOLDED FRICTION PAD FOR BRAKES AND CLUTCHES CONSISTING ESSENTIALLY OF FINELY DIVIDED PARTICLES OF MULLITE DISPERSED AND EMBEDDED IN AN INORGANIC, NON-METALLIC, BINDER HAVING A MELTING POINT OF AT LEAST 1100* C. AND CONSISTING ESSENTIALLY OF MANGANESE PYRO-PHOSPHATE. (MN2P2O7).
Claim 2
Dependent Claim
40 words
A MOLDED FRICTION PAD FOR BRAKES AND CLUTCHES CONSISTING ESSENTIALLY OF FINELY DIVIDED PARTICLES OF MULLITE DISPERSED AND EMBEDDED IN AN INORGANIC, NON-METALLIC, BINDER HAVING A MELTING POINT OF AT LEAST 1100* C. AND CONSISTING ESSENTIALLY OF MANGANESE PYRO-PHOSPHATE. (MN2P2O7).
References Cited (Backward Citations)
US1292953A
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US2284785A
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US2441534A
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US2389061A
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US2479504A
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GB740820A
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FR1105902A
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US2784105A
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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) | 1962-08-03 | 1963-02-02 | 1963-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-03 | 1967-02-02 | 1967-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-03 | 1971-02-02 | 1971-08-04 | $7700.00 | Window Closed / Lapsed |