Patent US5059317A successfully refreshed from Google Patents.
US5059317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transportable apparatus for producing drinking water
Assignee: Individual
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Filing: 1989-10-02
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Granted: 1991-10-22
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Expires: 2009-10-02
Abstract
Abstract An installation for filtering drinking water out of contaminated water, which can be used in many different situations, as it consists of a hydrocyclone, a micro filter unit, a unit for reverse osmosis, a mixed bed ion exchange, a re-salting unit, a unit for ozonization, an activated carbon filter and a unit for chlorinization.
Inventors
- 👤 Dietrich Marius
- 👤 Erich Mueller
- 👤 Christian Atzmueller
- 👤 Walter Doubrawa
- 👤 Helmut Irauscheck
- 👤 Werner Meierhofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:35
CPC Classifications
C; C02; C02F; C02F9/00; B; B01; B01D; B01D61/00; B01D61/02; B01D61/025; B01D61/04; B01D61/14; B01D61/147; B01D65/00; B01D65/02; B01D2311/00; B01D2311/04; B01D2321/00; B01D2321/04; C02F1/00; C02F1/28; C02F1/283; C02F1/42; C02F1/44; C02F1/441; C02F1/444; C02F1/72; C02F1/76; C02F1/78; C02F2101/00; C02F2101/006; C02F2201/00; C02F2201/008
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
55 words
An apparatus for obtaining drinking water out of contaminated water comprising: means for filtering the water; means for ozonizing the water; a micro filter device comprising at least two back-flushable membranes with a nominal pore size at least as small as approximately 0.2 μm; and means for back-flushing the membranes of the micro filter device.
Claim 2
Independent Claim
55 words
An apparatus for obtaining drinking water out of contaminated water comprising: means for filtering the water; means for ozonizing the water; a micro filter device comprising at least two back-flushable membranes with a nominal pore size at least as small as approximately 0.2 μm; and means for back-flushing the membranes of the micro filter device.
Claim 3
Dependent Claim
20 words
An apparatus as defined in claim 1 wherein the micro filter device comprises membranes which are made of sintered polypropylene.
Claim 4
Dependent Claim
21 words
An apparatus as defined in claim 2 further comprising a means for performing reverse osmosis sequentially after the micro filter device.
Claim 5
Dependent Claim
16 words
An apparatus as defined in claim 3 further comprising at least one means for softening water.
Claim 6
Dependent Claim
36 words
An apparatus as defined in claim 4 further comprising: mixed bed ion exchange means; and re-salting means, said mixed bed ion exchange means and re-salting means being installed immediately after the means for performing reverse osmosis.
Claim 7
Dependent Claim
36 words
An apparatus as defined in claim 3 further comprising: mixed bed ion exchange means; and re-salting means, said mixed bed ion exchange means and re-salting means being installed immediately after the means for performing reverse osmosis.
Claim 8
Dependent Claim
21 words
An apparatus as defined in claim 1 further comprising a means for performing reverse osmosis sequentially after the micro filter device.
Claim 9
Dependent Claim
16 words
An apparatus as defined in claim 7 further comprising at least one means for softening water.
Claim 10
Dependent Claim
36 words
An apparatus as defined in claim 8 further comprising: mixed bed ion exchange means; and re-salting means, said mixed bed ion exchange means and re-salting means being installed immediately after the means for performing reverse osmosis.
Claim 11
Dependent Claim
36 words
An apparatus as defined in claim 7 further comprising: mixed bed ion exchange means; and re-salting means, said mixed bed ion exchange means and re-salting means being installed immediately after the means for performing reverse osmosis.
Claim 12
Dependent Claim
25 words
An apparatus as defined in claim 1 wherein the micro filter device comprises membranes having a nominal pore size of less than approximately 0.2 μm.
Claim 13
Independent Claim
137 words
An apparatus for obtaining drinking water out of contaminated water comprising: means for separating suspended particles from the water, the means for separating suspended particles from the water comprising a hydrocyclone device; a micro filter device comprising at least two back-flushable membranes with a nominal pore size at least as small as approximately 0.2 μm; means for back-flushing the membranes of the micro filter device; means for carrying out reverse osmosis on the water after the water has been treated by the micro filter device; mixed bed ion exchange means; re-salting means, said mixed bed ion exchange means and re-salting means being installed immediately after the means for performing reverse osmosis; means for ozonizing the water; means for subjecting the water to filtering by activated carbon; and means for adding measured amounts of chlorine to the water.
Claim 14
Independent Claim
137 words
An apparatus for obtaining drinking water out of contaminated water comprising: means for separating suspended particles from the water, the means for separating suspended particles from the water comprising a hydrocyclone device; a micro filter device comprising at least two back-flushable membranes with a nominal pore size at least as small as approximately 0.2 μm; means for back-flushing the membranes of the micro filter device; means for carrying out reverse osmosis on the water after the water has been treated by the micro filter device; mixed bed ion exchange means; re-salting means, said mixed bed ion exchange means and re-salting means being installed immediately after the means for performing reverse osmosis; means for ozonizing the water; means for subjecting the water to filtering by activated carbon; and means for adding measured amounts of chlorine to the water.
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) | 1994-10-21 | 1995-04-22 | 1995-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-21 | 1999-04-22 | 1999-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-21 | 2003-04-22 | 2003-10-22 | $7700.00 | Window Closed / Lapsed |