US3871849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable carbon filter
Assignee: American Air Filter Co Inc
•
Filing: 1973-04-05
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Granted: 1975-03-18
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Expires: 1993-04-05
Abstract
Abstract The invention provides a disposable carbon filter comprising at least one six-sided paperboard carton including a pair of opposed parallel panels having cutaway sections, defining opposed flowthrough apertures therein, for the ingress of dirty air to be treated and the egress of clean air after treatment; and, a fluid pervious scrim material disposed within the paperboard carton across the flow-through apertures to compressively contain activated carbon particles.
Inventors
- 👤 Tom R Smith
- 👤 Richard D Rivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:58
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D46/00; B01D46/10; B01D46/12; B01D2253/00; B01D2253/10; B01D2253/102; B01D2257/00; B01D2257/90; B01D2259/00; B01D2259/40; B01D2259/40083; B01D2259/40084; Y; Y10; Y10S; Y10S55/00; Y10S55/31
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
70 words
A CARBON FILTER COMPRISING: AT LEAST ONE SIX-SIDED CARTON INCLUDING A PAIR OF OPPOSED PANELS EACH HAVING CUTAWAY SECTIONS DEFINING FLOW-THROUGH APERTURES THEREIN; SIDEWALLS CONNECTING SAID PANELS; END PORTIONS FORMING CLOSED ENDS ON SAID CARTON; A FLUID PERVIOUS SCRIM MATERIAL DISPOSED WITHIN SAID CARTON ACROSS SAID FLOW-THROUGH APERTURES COMPRESSIVELY CONTAINING ACTIVATED GRANULAR CABRON PARTICLES TO FORM A FILTER BED RESISTANT TO THE ADVERSE EFFECTS OF VIBRATION AND CARBON PARTICLE ATTRITION.
Claim 2
Dependent Claim
70 words
A CARBON FILTER COMPRISING: AT LEAST ONE SIX-SIDED CARTON INCLUDING A PAIR OF OPPOSED PANELS EACH HAVING CUTAWAY SECTIONS DEFINING FLOW-THROUGH APERTURES THEREIN; SIDEWALLS CONNECTING SAID PANELS; END PORTIONS FORMING CLOSED ENDS ON SAID CARTON; A FLUID PERVIOUS SCRIM MATERIAL DISPOSED WITHIN SAID CARTON ACROSS SAID FLOW-THROUGH APERTURES COMPRESSIVELY CONTAINING ACTIVATED GRANULAR CABRON PARTICLES TO FORM A FILTER BED RESISTANT TO THE ADVERSE EFFECTS OF VIBRATION AND CARBON PARTICLE ATTRITION.
Claim 3
Dependent Claim
39 words
The filter of claim 1 wherein said fluid pervious scrim material covers said flow-through apertures in said panels and lines the interior of said six-sided carton to form a carbon holding cavity for compressively containing activated granular carbon particles.
Claim 4
Dependent Claim
30 words
The filter of claim 2 wherein said six-sided carton includes fastening means penetrating therethrough and supporting opposite sides thereof to provide a substantially uniform bed thickness throughout said six-sided carton.
Claim 5
Dependent Claim
56 words
The filter of claim 1 wherein said fluid pervious scrim material is formed into at least one fluid pervious filter bag compressively containing activated granular carbon particles and disposed in said carton across said flow-through apertures to form a carbon bed through which gases to be treated entering said carton must pass before leaving said carton.
Claim 6
Dependent Claim
29 words
The filter of claim 3 wherein said filter bag includes fastening means penetrating therethrough and supporting opposite sides thereof to provide a substantially uniform bed thickness throughout said bag.
Claim 7
Dependent Claim
57 words
The filter of claim 4 wherein a plurality of filter bags containing activated granular carbon particles are disposed in said six-sided carton in side-by-side relationship covering said flow-through apertures in said opposed panels and wherein said filter bags are adhesively secured to each other and to said panels to provide a uniform bed of granular carbon particles.
References Cited (Backward Citations)
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |