US2686140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition brake block
Assignee: Johns Manville Corp
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Filing: 1952-03-29
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Granted: 1954-08-10
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Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Charles L E De Gaugue Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:24
CPC Classifications
F; F16; F16D; F16D69/00; F16D69/02; F16D69/021; F16D69/022; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/256; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD COMPOSITION BRAKE BLOCK HAVING GOOD WET AND DRY FRICTION CHARACTERISTICS AND A LONG SERVICE LIFE, COMPRISING 25-75% BY WEIGHT OF HARD FERROUS METAL AT LEAST 50% OF WHICH IS IN THE FORM OF CAST IRON PARTICLES, AND AT LEAST 50% BY VOLUME OF NON-FERROUS INORGANIC AND ORGANIC FILLER AND ORGANIC BINDER MATERIALS INCLUDING A BINDER MATRIX COMPRISING A HEAT RESISTANT HARD VULCANIZED IN SITU-RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, POLYCHLORBUTADIENE, AND BUTADIENE-STYRENE AND BUTADIENE-ACRYLONITRILE COPOLYMERS.
Claim 2
Independent Claim
80 words
A METHOD COMPOSITION BRAKE BLOCK HAVING GOOD WET AND DRY FRICTION CHARACTERISTICS AND A LONG SERVICE LIFE, COMPRISING 25-75% BY WEIGHT OF HARD FERROUS METAL AT LEAST 50% OF WHICH IS IN THE FORM OF CAST IRON PARTICLES, AND AT LEAST 50% BY VOLUME OF NON-FERROUS INORGANIC AND ORGANIC FILLER AND ORGANIC BINDER MATERIALS INCLUDING A BINDER MATRIX COMPRISING A HEAT RESISTANT HARD VULCANIZED IN SITU-RUBBER SELECTED FROM THE GROUP CONSISTING OF NATURAL RUBBER, POLYCHLORBUTADIENE, AND BUTADIENE-STYRENE AND BUTADIENE-ACRYLONITRILE COPOLYMERS.
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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |