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US3765920A
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Bloated fly ash aggregates
Assignee: HUMPHREY ELMA B SURVIVING SPOUSE OF CLYDE W HUMPHREY DEC'D
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Filing: 1972-03-01
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Granted: 1973-10-16
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Expires: 1992-03-01
Abstract
Abstract Bloated fly ash aggregates suitable for use in concrete, asphalt and the like are produced by: homogeneously admixing with fly ash, first an aqueous solution of a alkali compound such as ammonium hydroxide, and then an aqueous dispersion of a watersoluble carbohydrate; forming the resulting admixture into aggregates, drying the aggregates; and finally firing the aggregates at a temperature causing fusion and bloating of the aggregates.
Inventors
- 👤 C Humphrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:43
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/085; C; C04; C04B; C04B18/00; C04B18/04; C04B18/06; C04B18/08; C04B18/085; C08; C08L; C08L95/00; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
19 words
The bloated aggregates of claim 1 further characterized in that the carbohydrate is a sugar, starch or mixtures thereof.
Claim 2
Dependent Claim
14 words
The bloated aggregates of claim 1 further characterized in that the carbohydrate is molasses.
Claim 3
Dependent Claim
25 words
The bloated aggregates of claim 1 further characterized in that the carbohydrate is molasses containing a surfactant that reduces the surface tension of the molasses.
Claim 4
Dependent Claim
23 words
The bloated aggregates of claim 3 further characterized in that the alkali compound is ammonium hydroxide, sodium hydroxide, potassium hydroxide or mixtures thereof.
Claim 5
Dependent Claim
16 words
The bloated aggregates of claim 3 further characterized in that the alkali compound is ammonium hydroxide.
Claim 6
Dependent Claim
16 words
The bloated aggregates of claim 4 further characterized in that the alkali compound is ammonium hydroxide.
Claim 7
Dependent Claim
29 words
The bloated aggregates of claim 7 further characterized in that the admixture is formed into aggregates by extruding the admixture into an extrudate and cutting the extrudate into aggregates.
Claim 8
Dependent Claim
26 words
The bloated aggregates of claim 8 further characterized in that the admixture has a moisture content of about 15 to 19% by weight before being extruded.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |