US3844741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air purifier
Assignee: Individual
•
Filing: 1972-10-11
•
Granted: 1974-10-29
•
Expires: 1992-10-11
Abstract
Abstract An air purifier having an electrostatic precipitator for removing particles from the air, an ultraviolet light for treating the air, and an ozone removing filter positioned downstream from the precipitator. A filter including a metallic screen positioned upstream of the precipitator. The precipitator including a helical wound wire forming loops with an electrical power source connected directly to each of the loops. A power source for the electrostatic precipitator adapted to be battery operated for use in an automobile.
Inventors
- 👤 P Dimitrik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:12
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/017; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0454; B03C3/02; B03C3/04; B03C3/14; B03C3/155; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/10; B01D2257/106; B01D2257/91; B01D2258/00; B01D2258/06; B01D2259/00; B01D2259/45; B01D2259/4566
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
An air purifier comprising, a housing having an inlet for receiving air and an outlet for discharging air, an electrostatic precipitator in the housing in the path of air flow from the inlet to the outlet for removing particles from the air, an ultraviolet light in the housing for treating the air passing through the housing, an ozone removing filter in the housing in the path of air flow downstream from the precipitator; wherein the precipitator includes a helical wound wire forming loops, and an electrical power source connected in parallel to a plurality of the loops.
Claim 2
Dependent Claim
97 words
An air purifier comprising, a housing having an inlet for receiving air and an outlet for discharging air, an electrostatic precipitator in the housing in the path of air flow from the inlet to the outlet for removing particles from the air, an ultraviolet light in the housing for treating the air passing through the housing, an ozone removing filter in the housing in the path of air flow downstream from the precipitator; wherein the precipitator includes a helical wound wire forming loops, and an electrical power source connected in parallel to a plurality of the loops.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 wherein the precipitator includes, a support supporting the helical wound wire including an air baffle coaxially positioned in the helix, and an electrical conductor carried by the support and in electrical contact with each of the loops.
Claim 4
Dependent Claim
23 words
The apparatus of claim 2 wherein the air path through the precipitator includes a serpentine passageway with a turn around said air baffle.
Claim 5
Dependent Claim
12 words
The apparatus of claim 1 wherein the ozone removing filter is grounded.
Claim 6
Dependent Claim
135 words
An air purifier comprising, a housing having an inlet for receiving air and an outlet for discharging air, an electrostatic precipitator in the housing in the path of air flow from the inlet to the outlet for removing particles from the air, an ultraviolet light in the housing for treating the air passing through the housing, and an ozone remoring filter in the housing in the path of air flow downstream from the precipitator; also including a power source connected to the electrostatic precipitator comprising, switching means adapted to be connected to a battery, a multivibrator connected to and actuating the switching means, coil means connected to the output of the switching means for stepping up the pulsating current from the switching means, and the output from the coil means connected to the electrostatic precipitator.
Claim 7
Dependent Claim
135 words
An air purifier comprising, a housing having an inlet for receiving air and an outlet for discharging air, an electrostatic precipitator in the housing in the path of air flow from the inlet to the outlet for removing particles from the air, an ultraviolet light in the housing for treating the air passing through the housing, and an ozone remoring filter in the housing in the path of air flow downstream from the precipitator; also including a power source connected to the electrostatic precipitator comprising, switching means adapted to be connected to a battery, a multivibrator connected to and actuating the switching means, coil means connected to the output of the switching means for stepping up the pulsating current from the switching means, and the output from the coil means connected to the electrostatic precipitator.
Claim 8
Dependent Claim
101 words
An air purifier comprising, a housing having an inlet for receiving air and an outlet for discharging air, a fan in the housing for moving air between the inlet and the outlet, an electrostatic precipitator in the housing in the path of air flow between the inlet and the outlet for removing particles from the air, said precipitator including an electrical element having a helical wound wire forming loops, an ultraviolet light in the housing for treating the air passing through the housing, and an activated charcoal filter in the housing in the path of air flow downstream from the precipitator.
Claim 9
Dependent Claim
101 words
An air purifier comprising, a housing having an inlet for receiving air and an outlet for discharging air, a fan in the housing for moving air between the inlet and the outlet, an electrostatic precipitator in the housing in the path of air flow between the inlet and the outlet for removing particles from the air, said precipitator including an electrical element having a helical wound wire forming loops, an ultraviolet light in the housing for treating the air passing through the housing, and an activated charcoal filter in the housing in the path of air flow downstream from the precipitator.
Claim 10
Dependent Claim
24 words
The apparatus of claim 6 wherein an electrical power source is conductive buss connected directly in parallel to a plurality of the wire loops.
Claim 11
Dependent Claim
59 words
The apparatus of claim 6 including a power source connected to the electrostatic precipitator comprising, switching means adapted to be connected to a battery, a free running multivibrator connected to switching means for stepped pulsating direct current voltage output from the switching means and stepped up pulsating direct current output from the electrical coil means connected to the precipitator.
References Cited (Backward Citations)
US2231330A
Cited
US2244279A
Cited
US2974747A
Cited
US3191362A
Cited
US3237068A
Cited
US3421291A
Cited
US3438180A
Cited
US3744217A
Cited
US3745750A
Cited
US3747300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |