US4822579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for the deacidification of water
Assignee: Deutsche Perlite GmbH
•
Filing: 1987-09-08
•
Granted: 1989-04-18
•
Expires: 2007-09-08
Abstract
Abstract A slow release alkali-reactive agent constitutes or is incorporated in floating bodies which are used to treat acid water for deacidification thereof.
Inventors
- 👤 Herbert H. Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:24
CPC Classifications
C; C02; C02F; C02F5/00; C02F1/00; C02F1/68; C02F1/685; C02F1/688; C02F2103/00; C02F2103/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
A solid body for the deacidification of water by neutralizing the water with an agent which is alkali-reactive in aqueous medium, said solid body having a specific gravity enabling it to float autonomously in the water and consisting essentially of water glass which has been made floatable by the formation of said water glass into a porous solid body to achieve a specific gravity of the body of 1 or less and has been made to dissolve slowly in said water to deacidfy said water.
Claim 2
Dependent Claim
85 words
A solid body for the deacidification of water by neutralizing the water with an agent which is alkali-reactive in aqueous medium, said solid body having a specific gravity enabling it to float autonomously in the water and consisting essentially of water glass which has been made floatable by the formation of said water glass into a porous solid body to achieve a specific gravity of the body of 1 or less and has been made to dissolve slowly in said water to deacidfy said water.
Claim 3
Dependent Claim
20 words
The body defined in claim 1 wherein said water glass is a substance which has been formed in a melt.
Claim 4
Dependent Claim
16 words
The body defined in claim 1 wherein said water glass is a sodium or potassium trisilicate.
Claim 5
Dependent Claim
14 words
The body defined in claim 1 wherein said body is held in a sieve-screen.
Claim 6
Dependent Claim
75 words
A solid body for the deacidification of water by neutralizing the water with an agent which is alkali-reactive in aqueous medium, said solid body having a specific gravity enabling it to float autonomously in the water and consisting essentially of a pressed mixture of porous-carrier particles charged with water glass, wherein the specific gravity of said solid body being 1 or less, wherein said water glass dissolves slowly in said water to deacidfy said water.
Claim 7
Dependent Claim
75 words
A solid body for the deacidification of water by neutralizing the water with an agent which is alkali-reactive in aqueous medium, said solid body having a specific gravity enabling it to float autonomously in the water and consisting essentially of a pressed mixture of porous-carrier particles charged with water glass, wherein the specific gravity of said solid body being 1 or less, wherein said water glass dissolves slowly in said water to deacidfy said water.
Claim 8
Dependent Claim
23 words
The body defined in claim 5 wherein said body is comprises of a mixture of porous particles and particles of said water glass.
Claim 9
Dependent Claim
13 words
The body defined in claim 6 wherein said mixture further comprises a binder.
Claim 10
Dependent Claim
16 words
The body defined in claim 7 wherein said binder is calcium sulfate or a hydraulic binder.
Claim 11
Dependent Claim
19 words
The body defined in claim 5 wherein said porous carrier has been charged with the water glass by impregnation.
Claim 12
Dependent Claim
31 words
The body defined in claim 5 wherein said porous carrier is made from a material from the group consisting of perlite particles, particles of micronized chalk, foamed glass, and mixtures thereof.
Claim 13
Dependent Claim
15 words
The body defined in claim 5 wherein said waterglass is a sodium or potassium trisilicate.
Claim 14
Dependent Claim
16 words
The body defined in claim 5 wherein said water glass has been formed in a melt.
Claim 15
Dependent Claim
14 words
The body defined in claim 5 wherein said body is held in a sieve-screen.
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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) | 1992-04-17 | 1992-10-17 | 1993-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-17 | 1996-10-17 | 1997-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-17 | 2000-10-17 | 2001-04-18 | $7700.00 | Window Closed / Lapsed |