US4548716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing ultrapure, pyrogen-free water
Assignee: Individual
•
Filing: 1984-07-25
•
Granted: 1985-10-22
•
Expires: 2004-07-25
Abstract
Abstract A method of producing ultrapore, pyrogen-free water comprising providing a source of water, filtering the water to remove suspended solids and organics, deionizing the water to remove dissolved solids, and introducing substantially pure ozone into the deionized water at a concentration of at least two milligrams of ozone per liter of deionized water to thereby produce ultrapure, pyrogen-free water.
Inventors
- 👤 Lucas Boeve
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:47
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/78; A; A61; A61L; A61L2/00; A61L2/02; A61L2/08; A61L2/10; A61L2/16; A61L2/20; A61L2/202; Y; Y10; Y10S; Y10S210/00; Y10S210/90
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
63 words
A method of producing ultrapure, pyrogen-free water comprising: (a) providing a source of water; (b) filtering said water to remove suspended solids and organics; (c) deionizing said water to remove dissolved solids; and (d) introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water to thereby produce ultrapure, pyrogen-free water.
Claim 2
Independent Claim
63 words
A method of producing ultrapure, pyrogen-free water comprising: (a) providing a source of water; (b) filtering said water to remove suspended solids and organics; (c) deionizing said water to remove dissolved solids; and (d) introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water to thereby produce ultrapure, pyrogen-free water.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said deionizing of step (c) is performed by a dual-bed deionizer followed by a mixed-bed deionizer.
Claim 4
Dependent Claim
17 words
The method of claim 1 further comprising treating said water with ultraviolet radiation prior to step (c).
Claim 5
Dependent Claim
20 words
The method of claim 1 further comprising treating said water with ultraviolet radiation both prior to and after step (c).
Claim 6
Dependent Claim
20 words
The method of claim 1 further comprising treating said water with ultraviolet radiation after step (d) to remove residual ozone.
Claim 7
Dependent Claim
24 words
The method of claim 1 wherein said substantially pure ozone of step (d) is generated by subjecting substantially pure oxygen to a corona discharge.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein said source of water has not been pre-treated by distillation, reverse osmosis, or deionization.
Claim 9
Dependent Claim
13 words
The method of claim 1 wherein said source of water is tap water.
Claim 10
Dependent Claim
12 words
The method of claim 1 wherein said source of water is wastewater.
Claim 11
Dependent Claim
12 words
The method of claim 1 wherein said source of water is seawater.
Claim 12
Dependent Claim
17 words
The method of claim 10 further comprising treating said seawater by reverse osmosis prior to step (c).
Claim 13
Independent Claim
69 words
A method of producing ultrapure, pyrogen-free water suitable for injection comprising: (a) providing a source of water; (b) filtering said water to remove suspended solids and organics; (c) deionizing said water to remove dissolved solids; and (d) introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water to thereby produce ultrapure, pyrogen-free water suitable for injection.
Claim 14
Independent Claim
69 words
A method of producing ultrapure, pyrogen-free water suitable for injection comprising: (a) providing a source of water; (b) filtering said water to remove suspended solids and organics; (c) deionizing said water to remove dissolved solids; and (d) introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water to thereby produce ultrapure, pyrogen-free water suitable for injection.
Claim 15
Independent Claim
110 words
A method of producing ultrapure, pyrogen-free water comprising: p1 (a) providing a source of water; (b) filtering said water to remove suspensed solids and organics; (c) treating said water in an ultraviolet purifer; (d) deionizing said water to remove dissolved solids; (e) passing said deionized water into a storage/surge tank; (f) treating said deionized water in an ozone contactor by introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water; (g) recirculating said ozone treated water first to said storage/surge tank and then to said ultraviolet purifier; and (h) removing ultrapure, pyrogen-free water from said ozone contactor.
Claim 16
Independent Claim
110 words
A method of producing ultrapure, pyrogen-free water comprising: p1 (a) providing a source of water; (b) filtering said water to remove suspensed solids and organics; (c) treating said water in an ultraviolet purifer; (d) deionizing said water to remove dissolved solids; (e) passing said deionized water into a storage/surge tank; (f) treating said deionized water in an ozone contactor by introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water; (g) recirculating said ozone treated water first to said storage/surge tank and then to said ultraviolet purifier; and (h) removing ultrapure, pyrogen-free water from said ozone contactor.
Claim 17
Dependent Claim
21 words
The method of claim 13 further comprising treating said water in an ultraviolet purifier after step (d) but before step (e).
Claim 18
Dependent Claim
24 words
The method of claim 13 further comprising treating said water in an ultraviolet purifier after step (h) to remove residual ozone from the water.
Claim 19
Independent Claim
56 words
A method of purifying water comprising: (a) providing a source of contaminated water; (b) filtering said water to remove suspended solids and organics; (c) deionizing said water to remove dissolved solids; and (d) introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water.
Claim 20
Independent Claim
56 words
A method of purifying water comprising: (a) providing a source of contaminated water; (b) filtering said water to remove suspended solids and organics; (c) deionizing said water to remove dissolved solids; and (d) introducing substantially pure ozone into said deionized water at a concentration of at least 2 milligrams of ozone per liter of deionized water.
References Cited (Backward Citations)
US799605A
Cited
US2889275A
Cited
US3276458A
Cited
US3870033A
Cited
US4069153A
Cited
US4160727A
Cited
US4280912A
Cited
US4172786A
Cited
US4230571A
Cited
US4273660A
Cited
US4256574A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-21 | 1989-04-22 | 1989-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-21 | 1993-04-22 | 1993-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-21 | 1997-04-22 | 1997-10-22 | $7700.00 | Window Closed / Lapsed |