US2890970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating rails to prevent oil films
Assignee: General Electric Co
•
Filing: 1954-07-23
•
Granted: 1959-06-16
•
Expires: 1974-07-23
Abstract
No abstract record available.
Inventors
- 👤 Robert K Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:57
CPC Classifications
E; E01; E01H; E01H8/00; E01H8/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD OF TREATING THE WEARING SURFACE OF A RAILHEAD THEREBY TO IMPROVE TRACTION OF A TRAIN THEREON BY PREVENTING CREEPAGE OF OIL FILMS OVER THE WEARING SURFACE FROM DEPOSITS OF GREASE ON THE RAILHEAD, COMPRISING APPLYING A PETROLEUM GREASE AND OIL EMULSIFYING DETERGENT TO THE RAILHEAD TO CLEAN THE WEARING SURFACE, APPLYING A HYDROPHOBIC SUBSTANCE IN LIQUID FORM TO THE WEARING SURFACE TO FORM A THIN WATER REPELLENT FILM TO PREVENT THE ADHESION OF A FILM OF MOISTURE THEREON TO SERVE AS A VEHICLE FACILITATING OIL CREEPAGE.
Claim 2
Independent Claim
88 words
A METHOD OF TREATING THE WEARING SURFACE OF A RAILHEAD THEREBY TO IMPROVE TRACTION OF A TRAIN THEREON BY PREVENTING CREEPAGE OF OIL FILMS OVER THE WEARING SURFACE FROM DEPOSITS OF GREASE ON THE RAILHEAD, COMPRISING APPLYING A PETROLEUM GREASE AND OIL EMULSIFYING DETERGENT TO THE RAILHEAD TO CLEAN THE WEARING SURFACE, APPLYING A HYDROPHOBIC SUBSTANCE IN LIQUID FORM TO THE WEARING SURFACE TO FORM A THIN WATER REPELLENT FILM TO PREVENT THE ADHESION OF A FILM OF MOISTURE THEREON TO SERVE AS A VEHICLE FACILITATING OIL CREEPAGE.
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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) | 1962-06-15 | 1962-12-15 | 1963-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-15 | 1966-12-15 | 1967-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-15 | 1970-12-15 | 1971-06-16 | $7700.00 | Window Closed / Lapsed |