Patent US3690227A successfully refreshed from Google Patents.
US3690227A
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US
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Frictional self-draining structure
Assignee: LLOYD G WELTY
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Filing: 1970-07-14
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Granted: 1972-09-12
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Expires: 1990-07-14
Abstract
Abstract A frictional, in situ self-draining composite structure for runway and roadway structural docking and pathway surface. The composite structure has a solid base to which is bound a porous superstratum of aggregate and resinous binder. The composite structure is fabricated by applying a first mixture containing about two to about four parts by volume of aggregate particles of crushed rock, river gravel, crushed coral, coarse sand, slag, or crushed refractory material and one part by volume of a settable resinous binder to the base section and allowing it to set, and then by applying a second mixture containing about two to about four parts by volume of scoria and/or slag particles and one part by volume of a settable resinuous binder to the first porous layer.
Inventors
- 👤 Lloyd G Welty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:52
CPC Classifications
E; E04; E04D; E04D11/00; E04D11/02; E01; E01C; E01C11/00; E01C11/22; E01C11/224; E01C11/225; E01C11/226; E01C3/00; E01C3/06; E01C7/00; E01C7/08; E01C7/30; E01C7/32; E01D; E01D19/00; E01D19/08; E01D19/083
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
42 words
The high strength, frictional, in situ self-draining composite structure defined in claim 1 wherein the aggregate particles of the superstratum layer are selected from the group particles of crushed scoria, rock, river gravel, crushed coral, coarse sand, slag, and crushed refractory material.
Claim 2
Dependent Claim
28 words
The high strength, frictional, in situ self-draining composite structure defined in claim 1 wherein the drain is at the base of the sloped upper surface of said base.
Claim 3
Dependent Claim
45 words
The high strength, frictional, in situ self-draining composite structure defined in claim 3 wherein the drain is a drainage conduit which is partially embedded in the top surface of said base, the top portion of said drain conduit being perforated with a plurality of holes.
Claim 4
Dependent Claim
25 words
The high strength, frictional, in situ self-draining composite structure defined in claim 1 including heating means below the top surface of the porous superstratum layer.
Claim 5
Dependent Claim
264 words
A high strength, frictional, in situ self-draining composite structure comprising: a solid imperforate and substantially impervious substrate base having a top surface for the collection and channeling of liquid to a drain and a superstratum porous throughout its depth and bonded to said base, said superstratum having a first porous layer bonded to said base and a second porous layer contiguous with and bonded to said first porous layer, said first porous layer consisting of aggregate particles of greater size than 1/16-inch mesh bonded together with a settable resinous binder which is present in an amount insufficient to fill the voids between aggregate particles, said first porous layer having about 2 to about 4 parts by volume of said aggregate particles and 1 part by volume of said settable resinous binder to give said layer a porosity of at least 10 percent and to give said layer an impact strength of at least 1,000 pounds per square inch, said second porous layer consisting of scoria and/or slag particles of greater size than 1/16-inch mesh bonded together with a settable resinous binder which binder serves to bond said first layer to said second layer and which is present in an amount insufficient to fill the voids between aggregate particles, said second porous layer having about 2 to about 4 parts by volume of said scoria and/or slag particles and 1 part by volume of said settable resinous binder to give said layer a porosity of at least 10 percent and to give said layer an impact strength of at least 1,000 pounds per square inch.
Claim 6
Dependent Claim
24 words
The high strength, frictional, in situ self-draining composite structure defined in claim 6 wherein said second porous layer is at least one-half inch thick.
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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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |