Patent US3864443A successfully refreshed from Google Patents.
US3864443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making light-weight concrete aggregate
Assignee: Individual
•
Filing: 1970-05-27
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Granted: 1975-02-04
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Expires: 1990-05-27
Abstract
Abstract An aggregate for making high-strength, light-weight concrete, the aggregate being constituted by shaped glass, asbestos, cement, metal or plastic elements whose surfaces are fluted and otherwise treated to improve the adhesion of the aggregate to the concrete matrix and which can be made hollow to effect a significant decrease in weight.
Inventors
- 👤 Arthur Hopkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:51
CPC Classifications
B; B28; B28B; B28B1/00; B28B1/004; B28B11/00; B28B11/003; B28B11/006; B28B11/04; B28B11/06; C; C04; C04B; C04B20/00; C04B20/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/2438; Y10T428/29; Y10T428/2913; Y10T428/2973; Y10T428/2975; Y10T428/2978
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
The method of making aggregate for use in a concrete matrix, said method comprising the steps of: A. continuously extruding a tube of moldable material through a die, said material having structural characteristics suitable for an aggregate, said tube having a diameter appropriate to aggregate, B. sealing and sectioning the tube to form individual aggregate elements; and C. treating the surface of the individual elements, while still moldable, to improve their adhesion characteristics.
Claim 2
Independent Claim
73 words
The method of making aggregate for use in a concrete matrix, said method comprising the steps of: A. continuously extruding a tube of moldable material through a die, said material having structural characteristics suitable for an aggregate, said tube having a diameter appropriate to aggregate, B. sealing and sectioning the tube to form individual aggregate elements; and C. treating the surface of the individual elements, while still moldable, to improve their adhesion characteristics.
Claim 3
Dependent Claim
15 words
The method as set forth in claim 1, wherein said tube is formed of glass.
Claim 4
Dependent Claim
17 words
The method as set forth in claim 1, wherein said tube is formed of synthetic plastic material.
Claim 5
Dependent Claim
16 words
The method as set forth in claim 1, wherein said tube is formed of ceramic material.
Claim 6
Dependent Claim
22 words
The method as set forth in claim 1, wherein the surface of said tube is longitudinally fluted in the course of extrusion.
Claim 7
Dependent Claim
34 words
The method as set forth in claim 1, wherein the surface of said tube is sprayed with particles before said tube is sectioned, whereby the particles embed in the surface and become encrusted therein.
Claim 8
Dependent Claim
37 words
The method as set forth in claim 6, wherein said particles are of different size and are successively applied so that the coarse particles are applied, then the medium particles and finally the fine particles are applied.
Claim 9
Dependent Claim
18 words
The method as set forth in claim 7, wherein the particle-coated tube is sprayed with a protective film.
Claim 10
Dependent Claim
30 words
The method as set forth in claim 1, wherein the extruded tube is formed with closed cells to incorporate air pockets therein which improve the thermal properties of the aggregate.
Claim 11
Dependent Claim
18 words
The method as set forth in claim 1, wherein the tube is extruded with reinforcing wires embedded therein.
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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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |