US4609471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser disinfection of fluids enhanced by gas bubbles
Assignee: Autotrol Corp
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Filing: 1984-04-25
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Granted: 1986-09-02
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Expires: 2004-04-25
Abstract
Abstract A method of disinfecting a liquid includes introducing bubbles of a gas into a stream of liquid to be treated and passing the stream with the bubbles through a laser beam which radiates coherent light in the ultraviolet range. The gas may be selected from ozone, oxygen, hydrogen and chlorine or other halogens.
Inventors
- 👤 Bernard J. Beemster
- 👤 Paul R. Goudy, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:23
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/72; C02F1/78; C02F1/30; C02F1/32; C02F1/325; C02F1/727; C02F1/76; C02F2201/00; C02F2201/32; C02F2201/322; C02F2201/3226
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
A method of disinfecting a liquid, comprising: introducing bubbles of a gas into a stream of liquid to be treated; and passing the stream of the liquid with the bubbles through a laser beam which radiates coherent light in the ultraviolet range.
Claim 2
Independent Claim
42 words
A method of disinfecting a liquid, comprising: introducing bubbles of a gas into a stream of liquid to be treated; and passing the stream of the liquid with the bubbles through a laser beam which radiates coherent light in the ultraviolet range.
Claim 3
Dependent Claim
12 words
A method in accordance with claim 1 wherein the gas is ozone.
Claim 4
Dependent Claim
25 words
A method in accordance with claim 1 wherein the gas is selected from the group consisting of ozone, oxygen, hydrogen and chlorine or other halogens.
Claim 5
Dependent Claim
22 words
A method in accordance with claim 1 wherein the bubbles of gas are introduced into the stream upstream of the laser beam.
Claim 6
Independent Claim
61 words
The method of disinfecting water, comprising the steps of: providing a stream of water to be treated; generating a pulsed gas laser beam which radiates coherent light in the ultraviolet range through the use of a spark gap switch; evacuating the ozone from the spark gap switch; bubbling the ozone into said stream; and directing said laser beam through said stream.
Claim 7
Independent Claim
61 words
The method of disinfecting water, comprising the steps of: providing a stream of water to be treated; generating a pulsed gas laser beam which radiates coherent light in the ultraviolet range through the use of a spark gap switch; evacuating the ozone from the spark gap switch; bubbling the ozone into said stream; and directing said laser beam through said stream.
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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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |