US2498862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated mineral aggregate and method of making same
Assignee: ROUTIERE de la GIRONDE SOC CHI
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Filing: 1946-08-01
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Granted: 1950-02-28
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Expires: 1966-08-01
Abstract
No abstract record available.
Inventors
- 👤 Petitjean Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/18; C; C08; C08L; C08L95/00; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/31504; Y10T428/31815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A MATERIAL FOR SURFACING ROADS AND THE LIKE, SAID MATERIAL COMPRISING A MINERAL AGGREGATE COATED WITH TWO SUCCESSIVE COLLOIDAL LAYERS, THE FIRST LAYER BEING A TAR OF THE GROUP CONSISTING OF COKE OVEN TAR, GAS TAR, WATER GAS TAR AND WOOD TAR AND COLLOIDALLY DISPERSED THEREIN AN AQUEOUS CAUSTIC ALKALI SOLUTION, THE SECOND LAYER BEING A SEMI-POROUS BITUMINOUS ASPHALT, SAID SECOND LAYER BEING IMPREGNATED WITH AND THE EXTERNAL SURFACE OF THE SECOND LAYER BEING COVERED WITH A CAUSTIC ALKALI SOLUTION, THE SAID CAUSTIC ALKALI SOLUTION IMPREGNATING AND COVERING THE SECOND LAYER BEING A PRODUCT OF THE RUPTURE OF A COLLOIDAL DISPERSION INCLUDING SAID TAR AND SAID CAUSTIC ALKALI SOLUTION.
Claim 2
Dependent Claim
109 words
A MATERIAL FOR SURFACING ROADS AND THE LIKE, SAID MATERIAL COMPRISING A MINERAL AGGREGATE COATED WITH TWO SUCCESSIVE COLLOIDAL LAYERS, THE FIRST LAYER BEING A TAR OF THE GROUP CONSISTING OF COKE OVEN TAR, GAS TAR, WATER GAS TAR AND WOOD TAR AND COLLOIDALLY DISPERSED THEREIN AN AQUEOUS CAUSTIC ALKALI SOLUTION, THE SECOND LAYER BEING A SEMI-POROUS BITUMINOUS ASPHALT, SAID SECOND LAYER BEING IMPREGNATED WITH AND THE EXTERNAL SURFACE OF THE SECOND LAYER BEING COVERED WITH A CAUSTIC ALKALI SOLUTION, THE SAID CAUSTIC ALKALI SOLUTION IMPREGNATING AND COVERING THE SECOND LAYER BEING A PRODUCT OF THE RUPTURE OF A COLLOIDAL DISPERSION INCLUDING SAID TAR AND SAID CAUSTIC ALKALI SOLUTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |