US3227249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molded composition brake shoe comprising organic bond, hard mineral filler, and cryolite
Assignee: Raymark Industries Inc
•
Filing: 1959-06-25
•
Granted: 1966-01-04
•
Expires: 1979-06-25
Abstract
No abstract record available.
Inventors
- 👤 Joseph N Kuzmick
- 👤 John B Littlefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:52
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/04; F16D65/06; F16D65/062
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A MOLDED COMPOSITION BRAKE SHOE COMPRISING THE COMBINATION OF (A) AN ORGANIC HEAT-SOFTENING BOND MATRIX COMPRISING A MIXTURE OF A SYNTHETIC RUBBER SELECTED FROM THE CLASS OF BUTADIENE-STYRENE COPOLYMERS AND A RESIN SELECTED FROM THE CLASS OF CASHEW NUT SHELL LIQUID RESINS, (B) A HARD MINERAL FILLER HAVING A HARDNESS OF AT LEAST 6 ON THE MOH SCALE, WITH (C) THE ADDITION THERETO OF CRYOLITE; THE ORGANIC BOND, THE HARD MINERAL FILLER AND THE CRYOLITE COMPRISING TOGETHER THE ESSENTIAL AND MAJOR INGREDIENTS BY WEIGHT OF THE COMPOSITION, THE HARD MINERAL FILLER BEING IN A PROPORTION TO IMPART A WET TO DRY FRICTION RATIO APPROACHING UNITY, AND THE CRYOLITE BEING IN A PROPORTION LESS THAN THAT OF THE ORGANIC BOND OR THE HARD MINERAL FILLER AND BEING EFFECTIVE TO IMPART IMPROVED WHEEL TREAD LIFE TO THE BRAKE SHOE.
Claim 2
Dependent Claim
137 words
A MOLDED COMPOSITION BRAKE SHOE COMPRISING THE COMBINATION OF (A) AN ORGANIC HEAT-SOFTENING BOND MATRIX COMPRISING A MIXTURE OF A SYNTHETIC RUBBER SELECTED FROM THE CLASS OF BUTADIENE-STYRENE COPOLYMERS AND A RESIN SELECTED FROM THE CLASS OF CASHEW NUT SHELL LIQUID RESINS, (B) A HARD MINERAL FILLER HAVING A HARDNESS OF AT LEAST 6 ON THE MOH SCALE, WITH (C) THE ADDITION THERETO OF CRYOLITE; THE ORGANIC BOND, THE HARD MINERAL FILLER AND THE CRYOLITE COMPRISING TOGETHER THE ESSENTIAL AND MAJOR INGREDIENTS BY WEIGHT OF THE COMPOSITION, THE HARD MINERAL FILLER BEING IN A PROPORTION TO IMPART A WET TO DRY FRICTION RATIO APPROACHING UNITY, AND THE CRYOLITE BEING IN A PROPORTION LESS THAN THAT OF THE ORGANIC BOND OR THE HARD MINERAL FILLER AND BEING EFFECTIVE TO IMPART IMPROVED WHEEL TREAD LIFE TO THE BRAKE SHOE.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |