US2688005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cushion for railroad ties comprising a copolymer of styrene and isobutylene, a bituminous material, and a fibrous material
Assignee: Standard Oil Development Co
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Filing: 1952-04-30
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Granted: 1954-08-31
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Expires: 1972-04-30
Abstract
No abstract record available.
Inventors
- 👤 Jr Robert E Clayton
- 👤 Raymond G Newberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:11
CPC Classifications
E; E01; E01B; E01B9/00; E01B9/68; E01B9/681; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/10; C08K7/12; C08L; C08L25/00; C08L25/02; C08L25/04; C08L25/08; C08L95/00; Y; Y10; Y10S; Y10S260/00; Y10S260/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A CUSHIONING COMPOSITION FOR RAILROAD TIES CONSISTING OF 15 TO 35% BY WEIGHT OF A COPOLYMER OF 60 TO 40% BY WEIGHT ISOBUTYLENE AND 40 TO 60% BY WEIGHT OF STYRENE, 15 TO 35% BY WEIGHT OF PETROLEUM ASPHALT, AND 30 TO 70% BY WEIGHT OF ASBESTOS.
Claim 2
Dependent Claim
47 words
A CUSHIONING COMPOSITION FOR RAILROAD TIES CONSISTING OF 15 TO 35% BY WEIGHT OF A COPOLYMER OF 60 TO 40% BY WEIGHT ISOBUTYLENE AND 40 TO 60% BY WEIGHT OF STYRENE, 15 TO 35% BY WEIGHT OF PETROLEUM ASPHALT, AND 30 TO 70% BY WEIGHT OF ASBESTOS.
References Cited (Backward Citations)
GB611642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |