US3081035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pads
Assignee: Midwest Rubber Reclaiming Co
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Filing: 1958-11-10
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Granted: 1963-03-12
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Expires: 1978-11-10
Abstract
No abstract record available.
Inventors
- 👤 Meyer Ree Vilma Le Beau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:31
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/68; E01B9/681; E01B9/683; C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L23/22; C08L95/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A RAILROAD TIE PAD ADAPTED TO BE POSITIONED BETWEEN A RAILROAD TIE AND AN OVERLYING TIE PLATE, COMPRISING A SUPPORTING MEMBER COATED WITH A COMPOSITION COMPRISING BETWEEN APPROXIMATELY 3% AND APPROXIMATELY 35% BY WEIGHT OF AN UNVULCANIZED RUBBERY MATERIAL SELECTED FROM THE GROUP CONSISTING A POLYISOBUTYLENE AND A COPOLYMER OF ISOBUTYLENE AND SMALL AMOUNTS OF A DIOLEFIN, SAID MATERIAL HAVING A MOLECULAR WWEIGHT GREATER THAN 10, 000, BETWEEN APPROXIMATELY 1% AND 70% BY WEIGHT OF ASPHALT HAVING A RING AND BALL SOFTENING POINT BETWEEN APPROXIMATELY 125* F. AND 190* F. AND A SPECIFIC GRAVITY BETWEEN APPROXIMATELY 1.01 AND 1.04 BETWEEN APPROXIMATELY 1% AND APPROXIMATELY 15% BY WEIGHT OF MICROCRYSTALLINE WAX HAVING A MELTING POINT ABOVE APPROXIMATELY 170* F. AND A PENETRATION (AT 77* F.) BETWEEN APPROXIMATELY 10 AND 20, BETWEEN APPROXIMATELY 10% AND APPROXIMATELY 40% BY WEIGHT OF AN INERT, WATER-INSOLUBLE FILLER AND BETWEEN APPROXIMATELY 4% AND APPROXIMATELY 25% BY WEIGHT OF A RUBBER PROCESSING OIL.
Claim 2
Dependent Claim
156 words
A RAILROAD TIE PAD ADAPTED TO BE POSITIONED BETWEEN A RAILROAD TIE AND AN OVERLYING TIE PLATE, COMPRISING A SUPPORTING MEMBER COATED WITH A COMPOSITION COMPRISING BETWEEN APPROXIMATELY 3% AND APPROXIMATELY 35% BY WEIGHT OF AN UNVULCANIZED RUBBERY MATERIAL SELECTED FROM THE GROUP CONSISTING A POLYISOBUTYLENE AND A COPOLYMER OF ISOBUTYLENE AND SMALL AMOUNTS OF A DIOLEFIN, SAID MATERIAL HAVING A MOLECULAR WWEIGHT GREATER THAN 10, 000, BETWEEN APPROXIMATELY 1% AND 70% BY WEIGHT OF ASPHALT HAVING A RING AND BALL SOFTENING POINT BETWEEN APPROXIMATELY 125* F. AND 190* F. AND A SPECIFIC GRAVITY BETWEEN APPROXIMATELY 1.01 AND 1.04 BETWEEN APPROXIMATELY 1% AND APPROXIMATELY 15% BY WEIGHT OF MICROCRYSTALLINE WAX HAVING A MELTING POINT ABOVE APPROXIMATELY 170* F. AND A PENETRATION (AT 77* F.) BETWEEN APPROXIMATELY 10 AND 20, BETWEEN APPROXIMATELY 10% AND APPROXIMATELY 40% BY WEIGHT OF AN INERT, WATER-INSOLUBLE FILLER AND BETWEEN APPROXIMATELY 4% AND APPROXIMATELY 25% BY WEIGHT OF A RUBBER PROCESSING OIL.
References Cited (Backward Citations)
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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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |