US4214911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of production of cellular concrete
Assignee: Centralny Osrodek Badawczo Rozwojowy Przemyslu Betonow Cebet
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Filing: 1978-06-28
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Granted: 1980-07-29
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Expires: 1998-06-28
Abstract
Abstract Cellular concrete is produced using, as filler, the sandy fraction of 80-90% SiO 2 content which is a waste material from the combustion of brown coal and, as binding agent lime and cement. These raw materials are dry ground and mixed with water having a temperature of about 50° C. and with a pore-producing agent. The thus obtained mixture is poured out into forms.
Inventors
- 👤 Janina Siejko
- 👤 Hanna Jatymowicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:26
CPC Classifications
C; C04; C04B; C04B18/00; C04B18/04; C04B18/06; C04B28/00; C04B28/02; C04B28/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A method for producing cellular concrete comprising the steps of mixing a filler, consisting essentially of a sandy fraction obtained as a waste material from the combustion of brown coal and having an SiO 2 content of 80-90%, with a binder consisting essentially of lime and cement, dry grinding the mixture of filler and binder, adding water at a temperature of about 50° C. and a pore-producing agent to said mixture and allowing the resulting mixture to set.
Claim 2
Independent Claim
78 words
A method for producing cellular concrete comprising the steps of mixing a filler, consisting essentially of a sandy fraction obtained as a waste material from the combustion of brown coal and having an SiO 2 content of 80-90%, with a binder consisting essentially of lime and cement, dry grinding the mixture of filler and binder, adding water at a temperature of about 50° C. and a pore-producing agent to said mixture and allowing the resulting mixture to set.
Claim 3
Dependent Claim
12 words
The method according to claim 1 wherein the lime is burnt lime.
Claim 4
Dependent Claim
12 words
The method according to claim 2 wherein the pore-producing agent is aluminum.
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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |