US4917862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter and method for removing mercury, bacteria, pathogens and other vapors from gas
Assignee: Individual
•
Filing: 1988-04-15
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Granted: 1990-04-17
•
Expires: 2008-04-15
Abstract
Abstract A filter for removing mercury and other vapors from air passed therethrough includes at least one container having a plurality of cells, each cell having an inlet and an outlet oriented substantially in the direction of the flow of air passed therethrough. The cells are partially filled with disintegration-resistant activated carbon pellets to permit swirling of the pellets within the cells as air passes therethrough. The filter may also include a pre-filter made up of fibrous materials and a post-filter located downstream from the containers. In addition, a filter assembly for removing elemental and molecular contaminants and air-born bacteria from contaminated air includes a casing with a filter means inside, the cells of the filter means being partially filled with disintegration-resistant activated carbon pellets and at least one germicidal light within the casing for air disinfection as air passes through the casing. Additional filters may be included within the casing for further removal of contaminants.
Inventors
- 👤 Allan Kraw
- 👤 Carol A. Kraw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:49
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D46/00; B01D46/10; B01D53/04; B01D53/0407; B01D53/0446; B01D53/06; B01D53/10; B01D53/12; B01D2253/00; B01D2253/10; B01D2253/102; B01D2253/25; B01D2253/30; B01D2253/34; B01D2253/342; B01D2253/3425; B01D2257/00; B01D2257/10; B01D2257/106; B01D2257/40; B01D2257/404; B01D2257/60; B01D2257/602; B01D2257/91; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40084; B01D2259/45; B01D2259/4508; B01D2259/4533; Y; Y02; Y02C; Y02C20/00; Y02C20/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
161 words
A filter for removing mercury and other vapors from air passed therethrough, comprising: at least one container having a plurality of cells, each cell having an inlet and an outlet oriented substantially in the direction of the flow of air passed therethrough, said cells being filled from about 30% to about 90% of the cell volume with disintegration-resistant activated carbon pellets having a high surface area, thereby permitting swirling of the pellets within the cells as air passes therethrough; a pre-filter made of a fibrous material located upstream from the container, said pre-filter being impregnated with activated carbon, and said pre-filter being adapted for removal of particulate material from air passing therethrough; a post-filter located downstream from the container, said post-filter made of fibrous material being impregnated with activated carbon, and said post-filter being adapted for removal of particulate material from air passing therethrough; and said filter for removing mercury being sized to fit standard heating ventilation and air conditioning systems.
Claim 2
Dependent Claim
161 words
A filter for removing mercury and other vapors from air passed therethrough, comprising: at least one container having a plurality of cells, each cell having an inlet and an outlet oriented substantially in the direction of the flow of air passed therethrough, said cells being filled from about 30% to about 90% of the cell volume with disintegration-resistant activated carbon pellets having a high surface area, thereby permitting swirling of the pellets within the cells as air passes therethrough; a pre-filter made of a fibrous material located upstream from the container, said pre-filter being impregnated with activated carbon, and said pre-filter being adapted for removal of particulate material from air passing therethrough; a post-filter located downstream from the container, said post-filter made of fibrous material being impregnated with activated carbon, and said post-filter being adapted for removal of particulate material from air passing therethrough; and said filter for removing mercury being sized to fit standard heating ventilation and air conditioning systems.
Claim 3
Dependent Claim
16 words
The filter of claim 1, wherein said at least one container includes honey-comb configuration type grids.
Claim 4
Dependent Claim
20 words
The filter of claim 1, wherein said at least one container includes two or more containers in an offset design.
Claim 5
Dependent Claim
15 words
The filter of claim 1 wherein said at least one container includes laminated cardboard grids.
Claim 6
Dependent Claim
12 words
The filter of claim 1, wherein said filter is a disposable filter.
Claim 7
Dependent Claim
15 words
The filter of claim 1, wherein said filter is adapted to fit an air conditioner.
Claim 8
Dependent Claim
24 words
The filter of claim 1, wherein said filter is adapted to fit and be removably detachable from a register for return or exiting air.
Claim 9
Dependent Claim
17 words
The filter of claim 1, wherein said filter is adapted to fit portable room air conditioning units.
Claim 10
Dependent Claim
20 words
The filter of as in claim 1, wherein said partially filled cells are from about 50% to about 75% filled.
Claim 11
Dependent Claim
16 words
The filter of claim 1, wherein said activated carbon pellets are impregnated with sulfur and iodine.
Claim 12
Dependent Claim
21 words
The filter as in claim 10, wherein said activated carbon pellets are impregnated with about 50% sulfur and about 50% iodine.
Claim 13
Independent Claim
120 words
A method of collecting contaminants including particulates, bacteria, pathogens, mercury and other vapors from contaminated gas, said method comprising: attaching a filter assembly to a heating, ventilating and air conditioning system so that air being recirculated through the system flows through the assembly, said filter assembly having at least one container including a plurality of cells partially filled with activated carbon pellets adapted to swirl when gas flows therethrough and at least one germicidal lamp; and flowing contaminated gas from an upstream position to a downstream position though the filter, thereby swirling the pellets contained therein, and eventually exposing substantially all of the surface of the pellets to the contaminated gas to effect removal of the contaminants by the filter.
Claim 14
Independent Claim
120 words
A method of collecting contaminants including particulates, bacteria, pathogens, mercury and other vapors from contaminated gas, said method comprising: attaching a filter assembly to a heating, ventilating and air conditioning system so that air being recirculated through the system flows through the assembly, said filter assembly having at least one container including a plurality of cells partially filled with activated carbon pellets adapted to swirl when gas flows therethrough and at least one germicidal lamp; and flowing contaminated gas from an upstream position to a downstream position though the filter, thereby swirling the pellets contained therein, and eventually exposing substantially all of the surface of the pellets to the contaminated gas to effect removal of the contaminants by the filter.
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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) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |