US3769054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of fly ash
Assignee: Enercon International Ltd
•
Filing: 1972-04-26
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Granted: 1973-10-30
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Expires: 1992-04-26
Abstract
Abstract Fly ash is subjected to a plurality of operations to recover therefrom a multiplicity of valuable products, including an iron concentrate, an improved pozzolanic material, a high carbon content product and an agglomerable material, suitable for formation into a controlled sintered aggregate product.
Inventors
- 👤 J Pennachetti
- 👤 J Boux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:49
CPC Classifications
B; B03; B03B; B03B9/00; B03B9/04; C; C04; C04B; C04B18/00; C04B18/04; C04B18/06; C04B18/08; C04B18/085; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S106/00; Y10S106/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
21 words
The process of claim 1 including the step of subjecting said pozzolanic material to magnetic separation to remove magnetic materials therefrom.
Claim 2
Dependent Claim
20 words
The process of claim 1 including the step of pulmerizing said heavy ends fly ash fraction prior to dry screening.
References Cited (Backward Citations)
US2987408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |