US3587964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective course for bridge deck
Assignee: WR Meadows Inc
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Filing: 1969-04-18
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Granted: 1971-06-28
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Expires: 1989-04-18
Abstract
Abstract A PROTECTIVE COURSE FOR A RAILROAD BRIDGE DECK TO BE INTERPOSED BETWEEN A MEMBRANE AT THE DECK SURFACE AND BALLAST ROCK THEREABOVE. THE COURSE IS FORMED AS TWO LAYERS OF SHEETING OF MODULAR SIZE ARRANGED IN AN ALTERNATING PATTERN SO THAT THE JOINTS OF ONE LAYER OFFSET THE JOINTS OF THE OTHER LAYER. EACH SHEET, RECTANGULAR IS FORM, IS A SANDWICHLIKE CONSTRUCTION INCLUDING A CORE SO ASPHALT AND LIMESTONE PARTICLES BETWEEN REINFORCING COVERS OF FELT WEB SATURATED WITH ASPHALT AND COATED WITH ASPHALT.
Inventors
- 👤 Dale Cork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:22
CPC Classifications
E; E01; E01B; E01B2/00; E01B2/003; E01D; E01D19/00; E01D19/08; E01D19/083; E01D19/12; E01B1/00; E01B1/001; E01B1/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |