Patent US3344094A successfully refreshed from Google Patents.
US3344094A
Expired / Lapsed
US
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Dry mix friction material comprising butadiene acrylonitrile rubber, phenol formaldehyde resin and filler
Assignee: Johns Manville Corp
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Filing: 1965-01-21
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Granted: 1967-09-26
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Expires: 1985-01-21
Abstract
No abstract record available.
Inventors
- 👤 Gaugue Charles Louis Ernest De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:22
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; C; C08; C08L; C08L61/00; C08L61/04; C08L61/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A DRY MIX PREPARED FRICTION MATERIAL OF IMPROVED WEAR LIFE CONSISTING ESSENTIALLY OF, IN APPROXIMATE PERCENTAGES BY WEIGHT: PERCENT PHENOL-FORMALDEHYDE THERMOSETTING RESIN 7 TO 12 BUTADIENE ACRYLONITRILE RUBBER 3 TO 8 SULFUR 0 TO 3 ZINC OXIDE 1 TO 6 CARBON BLACK 1 TO 3.5 GRAPHITE 1 TO 3.5 COPPER BASED ALLOY 2 TO 8 BARYTES 5 TO 10 TIRE PEELINGS, GROUND 5 TO 10 HARD RUBBER FRICTION PARTICLES 15 TO 35 ASBESTOS FIBER 20 TO 40
Claim 2
Dependent Claim
77 words
A DRY MIX PREPARED FRICTION MATERIAL OF IMPROVED WEAR LIFE CONSISTING ESSENTIALLY OF, IN APPROXIMATE PERCENTAGES BY WEIGHT: PERCENT PHENOL-FORMALDEHYDE THERMOSETTING RESIN 7 TO 12 BUTADIENE ACRYLONITRILE RUBBER 3 TO 8 SULFUR 0 TO 3 ZINC OXIDE 1 TO 6 CARBON BLACK 1 TO 3.5 GRAPHITE 1 TO 3.5 COPPER BASED ALLOY 2 TO 8 BARYTES 5 TO 10 TIRE PEELINGS, GROUND 5 TO 10 HARD RUBBER FRICTION PARTICLES 15 TO 35 ASBESTOS FIBER 20 TO 40
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) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |