US2880127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railway tie pads
Assignee: American Brake Shoe Co
•
Filing: 1955-12-23
•
Granted: 1959-03-31
•
Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 Ray E Spokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:52
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/68; E01B9/681; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31815; Y10T428/31855; Y10T428/31938; Y10T442/00; Y10T442/20; Y10T442/2369
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A RAILROAD TIE PAD COATING COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF BUTYL RUBBER HYDROCARBON AND ASPHALT IN THE RATIO OF ABOUT 2,5 TO 3 PARTS BY WEIGHT OF BUTYL RUBBER HYDROCARBON, FOR PREVENTING EMBRITTLEMENT OF THE PAD AT LOW TEMPERATURES, AND ABOUT 97 TO 97.5 PARTS BY WEIGHT OF ASPHALT, SAID ASPHALT BEING A BLEND OF ABOUT
Claim 2
Dependent Claim
58 words
A RAILROAD TIE PAD COATING COMPOSITION CONSISTING ESSENTIALLY OF A MIXTURE OF BUTYL RUBBER HYDROCARBON AND ASPHALT IN THE RATIO OF ABOUT 2,5 TO 3 PARTS BY WEIGHT OF BUTYL RUBBER HYDROCARBON, FOR PREVENTING EMBRITTLEMENT OF THE PAD AT LOW TEMPERATURES, AND ABOUT 97 TO 97.5 PARTS BY WEIGHT OF ASPHALT, SAID ASPHALT BEING A BLEND OF ABOUT
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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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |